Ingredients
For the Crumble Topping:
- 50g plain flour
- 45g rolled oats
- 60g chilled unsalted butter, cubed
- 70g demerara or light brown sugar
- 30g flaked almonds or extra oats (optional)
For the Cake Base:
- 150g self-raising flour
- 50g ground almonds
- 150g golden caster sugar
- 150g unsalted butter, softened
- 2 large free-range eggs
- 1 tsp vanilla extract
- 2 tbsp whole milk
The Fruit:
- 300g fresh jostaberries (topped and tailed)
Method
- Preheat and Prepare: Heat your oven to 180°C (160°C fan / Gas 4). Grease and line a 20cm loose-bottomed cake tin with baking parchment.
- Make the Crumble: In a medium bowl, stir together the plain flour and oats then rub the chilled butter into mix using your fingertips until it resembles coarse breadcrumbs. Stir in the brown sugar and flaked almonds/extra oats, then chill in the fridge.
- Mix the Cake Batter: In a large bowl, beat the softened butter and caster sugar together with an electric mixer until pale and fluffy. Beat in the eggs one at a time, followed by the vanilla extract and milk.
- Fold in Dry Ingredients: Sift the self-raising flour into the wet mixture, add the ground almonds, and gently fold with a spatula until just combined into a thick batter.
- Assemble: Spoon the cake batter into the prepared tin and smooth the surface evenly. Scatter the fresh jostaberries uniformly over the top of the batter, pressing them in very lightly. Cover the berry layer generously with your chilled crumble topping.
- Bake: Bake for 45 to 55 minutes. Test the center with a skewer; it should come out clean of wet cake batter, though it may be stained pink by the bubbling berries.
- Serve: Cool in the tin for 15 minutes before releasing. Serve warm with a generous pour of hot custard or vanilla ice cream.
- The tartness of the jostaberries makes a delicious contrast with the sweetness of the cake and crumble but if your jostaberries were picked early in the season and taste mouthpuckeringly sharp, mix them with a couple of teaspoons of extra caster sugar before scattering them onto the cake.


