Oatmeal Jam Bars Recipe
Buttery oatmeal crumble bars with a sweet-tart jam filling create the perfect balance of textures and flavors in every satisfying bite.
Ingredients
<ul class="ingredients-main-list"><li class="ingredients-single-item">200g rolled oats</li><li class="ingredients-single-item">200g plain flour</li><li class="ingredients-single-item">175g light brown sugar</li><li class="ingredients-single-item">1/4 tsp salt</li><li class="ingredients-single-item">1/4 tsp baking soda</li><li class="ingredients-single-item">225g unsalted butter, cold and cubed</li><li class="ingredients-single-item">300g fruit jam or preserves (raspberry, strawberry, apricot, etc.)</li><li class="ingredients-single-item">1 tsp vanilla extract</li><li class="ingredients-single-item">1 tbsp lemon juice (if using a very sweet jam)</li><li class="ingredients-single-item">Confectioners' sugar for dusting (optional)</li></ul>
Equipment
<ul class="equipment-main-list"><li class="equipment-single-item">23cm (9-inch) square baking pan</li><li class="equipment-single-item">Baking paper</li><li class="equipment-single-item">Food processor (optional)</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 (350°F). Line your 23cm square baking pan with baking paper, leaving an overhang on two sides to help lift the bars out later. Make sure to crease the corners well so your lining sits flat against the pan.</li><li class="MethodStepper"><h4 class="step-title">Step 2</h4>In a large bowl, whisk together the rolled oats, plain flour, light brown sugar, salt, and baking soda until thoroughly combined. This even distribution ensures consistent flavor and texture throughout your bars.</li><li class="MethodStepper"><h4 class="step-title">Step 3</h4>Add the cold cubed butter to the dry ingredients. Using your fingertips, rub the butter into the mixture until it resembles coarse crumbs with some pea-sized pieces remaining. Cold butter creates those wonderful pockets of texture that make for a perfect crumble. Alternatively, pulse the ingredients in a food processor until you achieve the same texture, being careful not to over-process.</li><li class="MethodStepper"><h4 class="step-title">Step 4</h4>Press two-thirds of the oat mixture firmly into the bottom of your prepared pan to form an even base layer. Use the bottom of a measuring cup to really compact the mixture – this helps create a sturdy foundation that won't crumble when cut.</li><li class="MethodStepper"><h4 class="step-title">Step 5</h4>If your jam is particularly sweet, stir in the tablespoon of lemon juice to balance the flavors. Then stir in the vanilla extract. Spread the jam evenly over the base, leaving about a 1cm border around the edges. This border prevents the jam from bubbling over and sticking to the sides of the pan.</li><li class="MethodStepper"><h4 class="step-title">Step 6</h4>Sprinkle the remaining oat mixture evenly over the jam layer. Don't press it down – the loose crumble topping creates a beautiful textural contrast to the firm base. Some jam peeking through is exactly what you want.</li><li class="MethodStepper"><h4 class="step-title">Step 7</h4>Bake in the preheated oven for 25-30 minutes, until the top is golden brown and the edges are slightly darker. The jam should be bubbling slightly at the edges – this is a perfect visual cue that your bars are done.</li><li class="MethodStepper"><h4 class="step-title">Step 8</h4>Allow the bars to cool completely in the pan set on a wire rack. This cooling period is crucial – it allows the jam to set and makes the bars easier to cut. For the cleanest cuts, refrigerate for at least 1 hour after cooling to room temperature.</li><li class="MethodStepper"><h4 class="step-title">Step 9</h4>Once completely cool, use the parchment paper overhang to lift the bars from the pan. Cut into 16 squares with a sharp knife, wiping the blade clean between cuts for the neatest presentation. If desired, dust lightly with confectioners' sugar just before serving.</li><li class="MethodStepper"><h4 class="step-title">Step 10</h4>Store the bars in an airtight container at room temperature for up to 3 days, or refrigerate for up to a week. You can also freeze them for up to 3 months – simply thaw at room temperature when ready to enjoy!</li></ol>
Chef’s Notes
A few helpful details for making this recipe.
Can I use homemade jam for crumble bars?
Absolutely! Homemade jam works wonderfully in these bars and often provides better flavour than store-bought varieties. If your homemade jam is particularly runny, you might want to cook it down slightly before using to prevent the bars from becoming soggy.
Why are my oat bars falling apart when I cut them?
This typically happens when the bars haven't cooled completely. For clean cuts, let them cool to room temperature, then refrigerate for at least an hour. Also ensure you've pressed the base layer firmly and used the correct butter-to-dry ingredient ratio.
What's the best type of jam to use for fruit crumble squares?
Thicker jams with a good balance of sweetness and acidity work best - raspberry, blackberry, and apricot are popular choices. Avoid very loose preserves as they can make the bars soggy. If using a sweeter variety like strawberry, add lemon juice to balance the flavours.
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