Lemon Blueberry Muffins

Directions

1. Preheat oven to 400°. In a large bowl, combine biscuit mix and 1/2 cup sugar. Whisk egg and sour cream; stir into dry ingredients just until moistened. Fold in blueberries.
2. Fill greased or paper-lined muffin cups half full. Combine lemon zest and remaining sugar; sprinkle over batter.
3. Bake until a toothpick inserted in the center comes out clean, 20-25 minutes. Cool for 5 minutes before removing from pan to a wire rack. Serve warm.