Grandma's Blueberry Buckle Recipe

Preheat oven to 375 degrees F (190 degrees C). Grease a 9x13-inch baking pan.

Prepare buckle: beat sugar and butter in a bowl using an electric mixer until creamy and smooth. Beat in eggs. Whisk flour baking powder and salt together in a separate bowl. Stir flour mixture into creamed butter mixture alternating with milk until batter is just combined; fold in blueberries. Pour batter into the prepared pan.

Prepare topping: combine sugar flour and cinnamon together in a bowl. Cut in cold butter using a pastry blender or 2 knives until topping is crumbly. Sprinkle topping over batter.

Bake in the preheated oven until a toothpick inserted into the center comes out clean 40 to 45 minutes. Cool buckle on a wire rack.