This Mixed Berry Crumble Cake is soft, buttery, and packed with blueberries, raspberries, and blackberries with a delicious golden crumble topping. Perfect for spring and summer baking!
Preheat the oven to 375. Line a square baking sheet with parchment paper.
In a large mixing bowl, add the milk, butter, lemon juice, sugar, vanilla, baking powder, and baking soda. Mix and then add your flour and a pinch of salt. Mix until a smooth batter forms.
Fold in your blueberries, raspberries, and blackberries. Transfer the batter into your lined baking dish and bake in the oven to 10 minutes.
While it bakes, in a small bowl, mix the soft butter, sugar, and flour to make your crumble. Sprinkle this on top of your cake and then continue to bake for another 25-30 minutes. You will know the cake is done when it is completely risen in the center and the crumble topping is golden.
Allow your cake to cool, top with berries and powdered sugar. Enjoy warm or at room temperature.