Baked Blueberry Crumb Doughnuts

Description:

Ingredients:

For the crumb topping:

1½ cups all-purpose flour
¾ cup light brown sugar
⅓ cup granulated sugar
¼ teaspoon salt
1 teaspoon cinnamon
¼ teaspoon freshly grated nutmeg
1½ sticks unsalted butter, chilled and diced

For the doughnuts:

2½ cups all-purpose flour
2 teaspoon baking powder
1 teaspoon baking soda
1 teaspoon salt
½ cup (1 stick) unsalted butter, softened
1 cup granulated sugar
2 large eggs
1 cup buttermilk
2 teaspoons vanilla extract
1 pint fresh blueberries
2 cups powdered sugar
3 to 6 tablespoons milk