M&M Cake Doughnuts

INGREDIENTS

For the doughnuts::

3 cups

all-purpose flour

1 tbsp

baking powder

1/2 tsp

fine salt

1/2 tsp

freshly grated nutmeg (optional)

large egg plus 1 egg yolk, at room temperature

2/3 cup

granulated sugar

1 1/2 tsp

pure vanilla extract

3 tbsp

unsalted butter, melted and cooled

1/2 cup

sour cream

Vegetable, canola, or peanut oil, for frying

For the chocolate glaze::

1 stick

unsalted butter

1/4 cup

whole milk

1 tbsp

light corn syrup

2 tsp

vanilla extract

4 oz

semisweet chocolate, chopped

2 cups

powdered sugar, sifted

Mini M&Ms