Blueberry Streusel Baked Donuts with Crumbly Topping - cookrisp

Ingredients

• 1 cup all-purpose flour
• 1/2 cup granulated sugar
• 1 teaspoon baking powder
• Pinch of salt
• 1 large egg
• 2 tablespoons melted butter
• 1/4 cup all-purpose flour
• 1/4 cup granulated sugar
• 2 tablespoons cold butter, cut into pieces