How to Bake Blueberry Crumb Cakes in 1 Hour

Ingredients

• 1 cup (120g) all-purpose flour
• 1 cup (100g) whole wheat flour
• ½ cup (100g) granulated sugar
• ½ cup (100g) brown sugar, packed
• 1 teaspoon baking powder
• ½ teaspoon baking soda
• ¼ teaspoon salt
• ½ cup (113g) unsalted butter, melted
• 2 large eggs
• 1 teaspoon vanilla extract
• ½ cup (120ml) buttermilk
• 1 cup (150g) fresh blueberries (or frozen)
• ½ cup (60g) all-purpose flour (for crumble)
• ¼ cup (50g) granulated sugar (for crumble)
• ¼ cup (50g) brown sugar, packed (for crumble)
• ½ teaspoon ground cinnamon (for crumble)
• ¼ cup (57g) unsalted butter, softened (for crumble)