Blueberry Buttermilk Clafoutis
Ingredients:
-
1 teaspoon butter
-
1 (10 ounce) package frozen blueberries
-
9 tablespoons all-purpose flour
-
1 pinch baking powder
-
1 pinch salt
-
1 cup buttermilk
-
3 eggs
-
6 tablespoons white sugar
-
1 teaspoon grated orange zest
-
1 teaspoon vanilla extract
-
1 tablespoon brown sugar, or more to taste