For the Cake

• 2 cups all-purpose flour
• 2 tsp baking powder
• ½ tsp baking soda
• ½ tsp salt
• ¾ cup granulated sugar
• ½ cup unsalted butter, softened
• 2 large eggs
• 1 tsp vanilla extract
• ¾ cup Greek yogurt or sour cream
• ¼ cup milk
• 1½ cups mixed berries (blueberries, raspberries, strawberries)

For the Crumble Topping

• ¾ cup all-purpose flour
• ½ cup brown sugar
• ½ tsp cinnamon
• Pinch of salt
• 5 tbsp cold unsalted butter, cubed

Optional Glaze

• ½ cup powdered sugar
• 1–2 tbsp milk
• ½ tsp vanilla extract

Instructions

1. Prepare the Crumble

1. Mix flour, brown sugar, cinnamon, and salt in a bowl.
2. Add cold butter and rub together until crumbly.
3. Set aside while preparing the cake.

2. Make the Cake Batter

1. Preheat oven to 175°C (350°F).
2. Grease and line an 8-inch square or 9-inch round baking pan.
3. Whisk flour, baking powder, baking soda, and salt together.
4. Beat butter and sugar until light and fluffy.
5. Add eggs one at a time, then mix in vanilla.
6. Stir in Greek yogurt and milk.
7. Gradually add dry ingredients and mix until just combined.
8. Fold in the berries gently.

3. Assemble and Bake

1. Spread batter evenly into the prepared pan.
2. Sprinkle crumble topping over the batter.
3. Bake for 40–45 minutes, or until a toothpick inserted in the center comes out clean.
4. Cool for 15–20 minutes before slicing.

4. Add Glaze (Optional)

Mix powdered sugar, milk, and vanilla until smooth. Drizzle over the cooled cake.