Chocolate Chunk Sandwich Cookies Recipe

Rich chocolate chunk cookies sandwiched together with smooth, velvety buttercream for a decadent treat that balances crisp edges with chewy centers.
Difficulty:
Beginner
Prep Time:
30 mins
Cook Time:
12 mins
Serves:
12 sandwich cookies
An overhead shot showcases a rustic wooden board with a stack of chocolate chunk sandwich cookies, some whole and one broken open to reveal the creamy filling between the cookies. The warm, natural light highlights the melty chocolate chunks embedded in the golden-brown cookie surface, creating appetizing shadows and depth. In the background, a vintage milk bottle with a striped paper straw sits beside scattered chocolate chunks and a few stray crumbs, while a gentle dusting of sea salt creates tiny sparkles on the cookie tops. The contrast between the dark chocolate, golden cookie, and pristine white filling creates a striking visual that emphasizes the homemade, indulgent nature of these sandwich treats.

Ingredients

<ul class="ingredients-main-list"><li class="ingredients-single-item">225g unsalted butter, softened</li><li class="ingredients-single-item">150g granulated sugar</li><li class="ingredients-single-item">150g light brown sugar, packed</li><li class="ingredients-single-item">2 large eggs, room temperature</li><li class="ingredients-single-item">2 tsp vanilla extract</li><li class="ingredients-single-item">300g 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">200g dark chocolate, roughly chopped (70% cocoa)</li><li class="ingredients-single-item">Flaky sea salt, for sprinkling</li><li class="ingredients-single-item"><strong>For the filling:</strong></li><li class="ingredients-single-item">115g unsalted butter, softened</li><li class="ingredients-single-item">200g powdered sugar, sifted</li><li class="ingredients-single-item">1 tsp vanilla extract</li><li class="ingredients-single-item">2 tbsp heavy cream</li></ul>

Equipment

<ul class="equipment-main-list"><li class="equipment-single-item">Electric mixer (stand or hand)</li><li class="equipment-single-item">Cookie scoop</li><li class="equipment-single-item">Baking sheets</li><li class="equipment-single-item">Parchment paper</li><li class="equipment-single-item">Wire cooling racks</li></ul>
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Directions

<ol class="no-list-style"><li class="MethodStepper"><h4 class="step-title">Step 1</h4>Preheat your oven to 180°C and line two baking sheets with parchment paper. This preparation ensures even cooking and prevents the cookies from sticking.</li><li class="MethodStepper"><h4 class="step-title">Step 2</h4>In a large bowl, cream together 225g softened butter with both sugars until light and fluffy, about 3-4 minutes. This extended creaming process incorporates air into the mixture, creating a lighter textured cookie with more lift.</li><li class="MethodStepper"><h4 class="step-title">Step 3</h4>Add eggs one at a time, mixing well after each addition, then stir in the vanilla extract. Ensure each egg is fully incorporated before adding the next – this creates a stable emulsion that helps with the cookie structure.</li><li class="MethodStepper"><h4 class="step-title">Step 4</h4>In a separate bowl, whisk together the flour, baking soda, and salt. Gradually add this dry mixture to the wet ingredients, mixing on low speed just until combined. Overmixing at this stage develops gluten, which can make your cookies tough rather than tender.</li><li class="MethodStepper"><h4 class="step-title">Step 5</h4>Fold in the chopped chocolate chunks by hand using a spatula. Using roughly chopped chocolate instead of chips creates melty pockets and varied texture throughout each cookie.</li><li class="MethodStepper"><h4 class="step-title">Step 6</h4>Using a cookie scoop, portion the dough into 24 equal balls (about 40g each) and place on prepared baking sheets, leaving 5cm between each cookie to allow for spreading. For perfectly round cookies, roll each portion briefly between your palms.</li><li class="MethodStepper"><h4 class="step-title">Step 7</h4>Gently press down on each cookie dough ball to slightly flatten, then sprinkle with a small amount of flaky sea salt. The salt enhances the chocolate flavor and adds a sophisticated flavor contrast.</li><li class="MethodStepper"><h4 class="step-title">Step 8</h4>Bake for 10-12 minutes, until the edges are set but the centers remain soft. They might look slightly underdone in the middle – this is perfect! The cookies will continue to cook on the hot baking sheet after removal from the oven.</li><li class="MethodStepper"><h4 class="step-title">Step 9</h4>Allow the cookies to cool on the baking sheets for 5 minutes before transferring to wire racks to cool completely. This brief resting period allows the cookies to set up enough to move without breaking.</li><li class="MethodStepper"><h4 class="step-title">Step 10</h4>While the cookies cool, prepare the filling. Beat 115g softened butter until creamy, about 2 minutes. Gradually add the sifted powdered sugar, mixing on low speed initially to prevent a sugar cloud, then increasing to medium-high once incorporated.</li><li class="MethodStepper"><h4 class="step-title">Step 11</h4>Add the vanilla extract and heavy cream to the buttercream, then beat on high speed for 3 minutes until light and fluffy. The cream adds a silky texture while air incorporated during whipping creates a lighter mouthfeel.</li><li class="MethodStepper"><h4 class="step-title">Step 12</h4>Once cookies are completely cool, match them in pairs of similar size. Pipe or spread about 2 tablespoons of filling onto the flat side of one cookie from each pair, then gently press the second cookie on top, flat side down, to create a sandwich.</li><li class="MethodStepper"><h4 class="step-title">Step 13</h4>Allow the sandwich cookies to set at room temperature for 30 minutes before serving. This resting time lets the filling firm up slightly so it doesn't squeeze out when bitten. Store in an airtight container for up to 4 days, or freeze for up to 3 months.</li></ol>

Nutrition Facts (per serving)

🍽️ Serving Size: 1 serving
🔥 Calories: 315 calories
🥑 Fat: 18 g
🧈 Saturated Fat: 11 g
🍞 Carbohydrates: 36 g
🍭 Sugar: 24 g
🍗 Protein: 3 g
🫀 Cholesterol: 65 mg
🧂 Sodium: 220 mg

Chef’s Notes

A few helpful details for making this recipe.

How can I achieve the perfect chewy centre and crisp edge texture for chocolate cookies?

For that ideal texture contrast, slightly underbake the cookies (10-12 minutes until just set at edges), use both white and brown sugars, and allow them to rest on the hot baking sheet for 5 minutes after baking. This carryover cooking creates crisp edges while preserving a chewy middle.

Can I freeze sandwich cookies with buttercream filling?

Yes! These sandwich cookies freeze beautifully for up to 3 months. Place them in a single layer in an airtight container with parchment between layers. Thaw at room temperature for 30-60 minutes before serving. The buttercream remains creamy even after freezing.

Why add sea salt to chocolate chunk cookies?

Sea salt enhances and balances the sweetness while amplifying the chocolate flavour through contrast. The occasional salt crystal creates flavour "bursts" that make each bite more interesting. This sweet-salty combination activates more taste receptors, creating a more complex sensory experience.

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