Ingredients

1/2 cup (1 stick) unsalted butter, melted, plus more for tins 

3/4 cup nonfat buttermilk 

2 large eggs 

1/2 cup sour cream 

1 cup yellow cornmeal 

1 cup all-purpose flour 

1/2 cup packed light-brown sugar 

2 tablespoons baking powder 

1 teaspoon coarse salt 

1/4 cup plus 2 tablespoons fresh or thawed frozen corn kernels 

Preparation

Preheat oven to 350 degrees. Brush cups of four 12-cup or two 24-cup mini muffin tins with melted butter; set aside. Whisk buttermilk, eggs, and sour cream in a medium bowl. Set aside.

Whisk cornmeal, flour, brown sugar, baking powder, salt, and corn kernels in a large bowl. Using a rubber spatula, fold in buttermilk mixture and melted butter. Divide batter among muffin cups, filling cups two-thirds full (1 heaping teaspoon batter per cup). Bake until a cake tester inserted into centers comes out clean, about 17 minutes. Let muffins cool in tins about 5 minutes before serving.