Blueberry Buckle (Sponge Cake with Crumble Topping)
Why this recipe works
- Tender cake, crisp topping: The soft butter sponge contrasts with a chilled crumble that bakes into distinct, golden crumbs.
- Fruit balances the sweetness: Blueberries bring juiciness and gentle acidity, keeping the rich cake and crumble from feeling heavy.
- Straightforward method: The batter uses simple creaming and folding steps, with visual cues for the crumble, bake and cooling stages.
Get the most out of this recipe
Texture tips
- Keep the crumb tender: Mix the flour into the batter only until smooth; overworking it can make the sponge heavier.
- Chill the crumble: Keeping the topping cold before baking helps it stay craggy and distinct rather than melting into the cake.
- Cool for cleaner slices: The cake cuts most neatly once fully cooled, as the berries and crumb have time to settle.
Timing notes
- Warm or cooled: Serve slightly warm for the softest texture, or cool completely if you want tidy slices.
- Let it stand briefly: Cooling in the pan for 10 minutes helps the cake firm enough to turn out or portion cleanly.
Ingredient notes
- Use ripe blueberries: Ripe berries give the best balance of sweetness, acidity and juicy pockets throughout the cake.
- Milk affects richness: Whole milk gives a fuller, softer crumb; low-fat milk works, but the cake will be slightly less rich.
- Fold the berries gently: A light hand keeps most of the blueberries whole, avoiding a streaky batter and preserving bursts of fruit.
Make-ahead tips
- Bake ahead: The cake keeps well in an airtight container and can be brought back to room temperature before serving.
- Freeze slices: Freeze well-wrapped slices, then defrost at room temperature for an easy make-ahead dessert or snack.
- Refresh gently: Warm slices in a 160°C (320°F) oven until just heated through to restore a softer crumb.
Equipment you'll need
Ingredients
Crumble topping
Cake
Instructions
- Heat the oven to 180°C (355°F). Grease a cake pan and set aside.
- Make the crumble topping: in a bowl, mix the flour, sugar and salt. Rub in the cold butter with your fingertips until you have a mix of small and medium crumbs, then chill while you make the batter.
- For the cake, beat the softened butter and sugar until pale and fluffy. Beat in the eggs one at a time, then mix in the vanilla.
- Whisk together the flour, baking powder and salt. Add the dry ingredients to the bowl in two additions, alternating with the milk, mixing just until smooth.
- Fold in the blueberries gently so they stay mostly whole. Scrape the batter into the prepared pan and level the top.
- Scatter the crumble evenly over the batter. Bake for 35 to 40 minutes, until the top is golden and a skewer inserted into the centre comes out clean or with a few moist crumbs.
- Cool in the pan for 10 minutes, then turn out or serve straight from the pan. Serve warm or cool, letting the berries settle slightly as it stands.
Recipe notes
Tips
- Keep the crumble cold until it goes on the cake so it bakes up craggy and distinct rather than melting into the batter.
- If the top is browning quickly but the centre needs longer, loosely cover the cake with foil for the final 10 minutes of baking.
- For the cleanest slices, cool fully; for the most tender texture, serve slightly warm.
Substitutions
- Replace Vanilla extract with vanilla bean paste for a more pronounced vanilla flavour.
- Replace Whole milk with low-fat milk; the crumb will be slightly less rich but still tender.
Storage
- Refrigerate up to 3 days
- Store in an airtight container. For best texture, bring to room temperature or warm in a 160°C (320°F) oven for 8 to 10 minutes; freeze slices well wrapped for up to 2 months and defrost at room temperature.
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Recipe overview
- Servings: 10 servings
- Total time: 55min (20min active)
- Difficulty: Easy
- Cuisine: American
-
Allergens:
Eggs Gluten Milk Wheat
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