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Cookie Dough Sheet Cake Recipe

Cookie Dough Sheet Cake Recipe

Learn how to make this homemade Cookie Dough Sheet Cake - the best combination of fudgy chocolate sheet cake topped with safe-to-eat cookie dough frosting. This easy baking recipe features a simple one-bowl cake method and no-egg cookie dough topping that tastes just like the real thing!
Difficulty:
Beginner
Prep Time:
30 mins
Cook Time:
25 mins
Serves:
1 cake (16 slices)
An overhead shot of a rectangular cookie dough sheet cake on a white ceramic platter, with one perfect square piece cut and slightly pulled away revealing the moist chocolate cake interior beneath the thick layer of speckled cookie dough frosting. Captured in soft natural light, the cake's surface is adorned with colorful sprinkles and mini chocolate chips that pop against the light beige frosting. The textural contrast between the dense, fudgy cake base and the creamy, chip-studded topping is evident in the clean-cut edge. A vintage cake server rests alongside the platter, and a few scattered chocolate chips and sprinkles surround the setup on a rustic wooden table, enhancing the playful, celebratory mood of this nostalgic dessert.

Ingredients

<ul class="ingredients-main-list"><li class="ingredients-single-item">For the chocolate sheet cake:</li><li class="ingredients-single-item">225g unsalted butter</li><li class="ingredients-single-item">60g cocoa powder</li><li class="ingredients-single-item">240ml water</li><li class="ingredients-single-item">300g granulated sugar</li><li class="ingredients-single-item">2 large eggs, room temperature</li><li class="ingredients-single-item">120ml buttermilk (or 120ml milk with 1 tbsp lemon juice)</li><li class="ingredients-single-item">1 tsp vanilla extract</li><li class="ingredients-single-item">250g all-purpose flour</li><li class="ingredients-single-item">1 tsp baking soda</li><li class="ingredients-single-item">1/2 tsp salt</li><li class="ingredients-single-item">For the cookie dough frosting:</li><li class="ingredients-single-item">225g unsalted butter, softened</li><li class="ingredients-single-item">200g light brown sugar, packed</li><li class="ingredients-single-item">1 tsp vanilla extract</li><li class="ingredients-single-item">250g all-purpose flour, heat-treated</li><li class="ingredients-single-item">1/2 tsp salt</li><li class="ingredients-single-item">60ml milk</li><li class="ingredients-single-item">150g mini chocolate chips</li><li class="ingredients-single-item">50g rainbow sprinkles, for topping</li></ul>

Equipment

<ul class="equipment-main-list"><li class="equipment-single-item">33x23cm (13x9-inch) baking pan</li><li class="equipment-single-item">Stand mixer or electric hand mixer</li><li class="equipment-single-item">Baking sheet (for heat-treating flour)</li><li class="equipment-single-item">Digital kitchen thermometer</li></ul>

Directions

<ol class="no-list-style"><li class="MethodStepper"><h4 class="step-title">Step 1</h4>First, heat-treat your flour for the frosting. Spread 250g flour on a baking sheet and bake at 180°C for 5-7 minutes until it reaches 75°C on a digital thermometer. This eliminates any harmful bacteria, making the flour safe to eat in the raw cookie dough frosting. Cool completely before using.</li><li class="MethodStepper"><h4 class="step-title">Step 2</h4>Preheat your oven to 180°C. Grease and line your 33x23cm baking pan with parchment paper, allowing some overhang for easy removal later.</li><li class="MethodStepper"><h4 class="step-title">Step 3</h4>For the chocolate cake, combine butter, cocoa powder, and water in a medium saucepan over medium heat. Stir constantly until the butter melts and the mixture comes to a simmer. Remove from heat immediately - overheating will cause the cocoa to become bitter.</li><li class="MethodStepper"><h4 class="step-title">Step 4</h4>Transfer the chocolate mixture to a large mixing bowl. Add sugar and whisk until combined, then let cool for 5 minutes. This cooling period prevents the eggs from scrambling when added.</li><li class="MethodStepper"><h4 class="step-title">Step 5</h4>Add eggs one at a time, whisking well after each addition until fully incorporated. Stir in buttermilk and vanilla extract. The acidity in buttermilk will react with the baking soda to help the cake rise properly and create a tender crumb.</li><li class="MethodStepper"><h4 class="step-title">Step 6</h4>In a separate bowl, whisk together flour, baking soda, and salt. Gradually fold the dry ingredients into the wet mixture until just combined. Be careful not to overmix as this develops gluten and can make your cake tough.</li><li class="MethodStepper"><h4 class="step-title">Step 7</h4>Pour the batter into your prepared pan, smoothing the top with a spatula. Bake for 25-30 minutes, or until a toothpick inserted in the center comes out with a few moist crumbs (but no wet batter). Look for the cake to start pulling away slightly from the edges of the pan.</li><li class="MethodStepper"><h4 class="step-title">Step 8</h4>Allow the cake to cool completely in the pan on a wire rack before frosting. This may take 1-2 hours. Patience here is key - applying frosting to a warm cake will cause it to melt.</li><li class="MethodStepper"><h4 class="step-title">Step 9</h4>For the cookie dough frosting, beat softened butter and brown sugar in a stand mixer fitted with the paddle attachment for 3-4 minutes until light and fluffy. The extended beating time incorporates air and creates that signature cookie dough texture.</li><li class="MethodStepper"><h4 class="step-title">Step 10</h4>Add vanilla extract and mix to combine. Gradually add the cooled heat-treated flour and salt, mixing on low speed to prevent a flour cloud. The mixture will look crumbly at this point.</li><li class="MethodStepper"><h4 class="step-title">Step 11</h4>Add milk one tablespoon at a time, mixing after each addition until the frosting reaches a smooth, spreadable consistency that resembles cookie dough. You may need slightly more or less milk depending on your environment.</li><li class="MethodStepper"><h4 class="step-title">Step 12</h4>Fold in the mini chocolate chips by hand using a rubber spatula. This gentle folding preserves the air you've incorporated during beating.</li><li class="MethodStepper"><h4 class="step-title">Step 13</h4>Spread the cookie dough frosting generously over the cooled cake, creating swirls and peaks with your spatula. Immediately sprinkle with rainbow sprinkles while the frosting is still soft so they adhere properly.</li><li class="MethodStepper"><h4 class="step-title">Step 14</h4>For clean slices, refrigerate the cake for 30 minutes before cutting. Store leftovers in an airtight container at room temperature for up to 3 days, or refrigerate for up to 5 days. Allow refrigerated cake to come to room temperature before serving for the best texture and flavor.</li></ol>

FAQs

Find answers to your most pressing questions about this delicious recipe right here.

What ingredients are used in Cookie Dough Sheet Cake Recipe?

This recipe uses unsalted butter, cocoa powder, eggs, buttermilk, flour, sugar, baking soda, and vanilla for the cake. The cookie dough frosting requires heat-treated flour, butter, brown sugar, vanilla, salt, milk, mini chocolate chips and rainbow sprinkles.

How to cook Cookie Dough Sheet Cake Recipe at home?

Learn how to cook Cookie Dough Sheet Cake Recipe by making a simple one-bowl chocolate cake baked at 180°C for 25-30 minutes, then topping it with no-egg cookie dough frosting made from heat-treated flour for safety. The recipe combines a moist, fudgy cake base with a creamy cookie dough topping that's studded with mini chocolate chips.

Why do I need to heat-treat flour for cookie dough frosting?

Heat-treating flour kills potentially harmful bacteria like E. coli that can be present in raw flour. By baking the flour at 180°C until it reaches 75°C internally, you make it safe to consume in raw cookie dough applications while maintaining the authentic cookie dough taste.

Can I make this chocolate sheet cake ahead of time for a party?

Absolutely! The chocolate sheet cake can be made 1-2 days in advance. Store unfrosted cake tightly wrapped at room temperature, or freeze for up to 3 months. Apply the cookie dough frosting fresh on the day of serving for the best texture and flavour.

Is there a way to make cookie dough frosting without dairy?

Yes, you can substitute plant-based butter and non-dairy milk (such as almond or oat) in equal quantities for a dairy-free version. The texture may be slightly different, but the taste will still capture that classic cookie dough flavour that makes this frosting so popular.

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This cooling period prevents the eggs from scrambling when added." }, { "@type": "HowToStep", "name": "Add wet ingredients", "text": "Add eggs one at a time, whisking well after each addition until fully incorporated. Stir in buttermilk and vanilla extract. The acidity in buttermilk will react with the baking soda to help the cake rise properly and create a tender crumb." }, { "@type": "HowToStep", "name": "Combine dry ingredients", "text": "In a separate bowl, whisk together flour, baking soda, and salt. Gradually fold the dry ingredients into the wet mixture until just combined. Be careful not to overmix as this develops gluten and can make your cake tough." }, { "@type": "HowToStep", "name": "Bake cake", "text": "Pour the batter into your prepared pan, smoothing the top with a spatula. Bake for 25-30 minutes, or until a toothpick inserted in the center comes out with a few moist crumbs (but no wet batter). Look for the cake to start pulling away slightly from the edges of the pan." }, { "@type": "HowToStep", "name": "Cool completely", "text": "Allow the cake to cool completely in the pan on a wire rack before frosting. This may take 1-2 hours. Patience here is key - applying frosting to a warm cake will cause it to melt." }, { "@type": "HowToStep", "name": "Make frosting base", "text": "For the cookie dough frosting, beat softened butter and brown sugar in a stand mixer fitted with the paddle attachment for 3-4 minutes until light and fluffy. The extended beating time incorporates air and creates that signature cookie dough texture." }, { "@type": "HowToStep", "name": "Add dry ingredients to frosting", "text": "Add vanilla extract and mix to combine. Gradually add the cooled heat-treated flour and salt, mixing on low speed to prevent a flour cloud. The mixture will look crumbly at this point." }, { "@type": "HowToStep", "name": "Adjust frosting consistency", "text": "Add milk one tablespoon at a time, mixing after each addition until the frosting reaches a smooth, spreadable consistency that resembles cookie dough. You may need slightly more or less milk depending on your environment." }, { "@type": "HowToStep", "name": "Add chocolate chips", "text": "Fold in the mini chocolate chips by hand using a rubber spatula. This gentle folding preserves the air you've incorporated during beating." }, { "@type": "HowToStep", "name": "Frost and decorate", "text": "Spread the cookie dough frosting generously over the cooled cake, creating swirls and peaks with your spatula. Immediately sprinkle with rainbow sprinkles while the frosting is still soft so they adhere properly." }, { "@type": "HowToStep", "name": "Chill and serve", "text": "For clean slices, refrigerate the cake for 30 minutes before cutting. 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This recipe is definitely going into my regular rotation.", "name": "Frosting Is Amazing", "reviewRating": { "@type": "Rating", "ratingValue": "5" } }, { "@type": "Review", "author": "Aaliyah Patel", "datePublished": "2024-06-03", "reviewBody": "Made this for a family gathering and there wasn't a crumb left! The instructions were easy to follow even for a beginner baker like me. The combination of chocolate cake and cookie dough is simply brilliant.", "name": "No Leftovers!", "reviewRating": { "@type": "Rating", "ratingValue": "5" } }, { "@type": "Review", "author": "Henrik Johansson", "datePublished": "2024-05-30", "reviewBody": "This cake is dangerously good! I've made it twice in one week already. The texture contrast between the dense cake and the creamy frosting is perfect. 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