Sour Cream Blueberry Coffee Cake

Step 1
Preheat oven to 350 degrees F (175 degrees C). Grease a 9x13-inch baking dish.

Step 2
Combine 2 cups flour, baking powder, and salt in a bowl. Beat white sugar and 1 cup butter with an electric mixer in another bowl until light and fluffy; beat in eggs one at a time, allowing each egg to blend into the butter mixture before adding the next. Stir in sour cream and vanilla extract. Mix flour mixture into butter mixture until just blended; spread half the batter into prepared baking dish.

Step 3
Mix brown sugar, 1 cup flour, melted butter, and cinnamon in a bowl until mixture resembles a coarse crumble. Sprinkle half the crumbles and half the blueberries over batter in baking dish. Spread remaining half of batter over blueberries and top remaining crumbles, blueberries, and pecans.

Step 4
Bake in the preheated oven until a toothpick inserted into the center comes out clean, 45 to 50 minutes.