Nutmeg Crumb Cake

Directions

1. 1
   Preheat the oven to 375 degrees.
2. 2
   Coat an 8-inch square baking pan with nonstick oil spray.
3. 3
   Melt the butter in a medium saucepan or in a mixing bowl in a microwave oven.Stir in the flour, brown sugar, and nutmeg until the mixture resembles coarse crumbs.
4. 4
   Measure out and reserve 1/2 cup of the crumbs.
5. 5
   In a small bowl, whisk the baking soda into the buttermilk or yogurt, then whisk in the vanilla and egg yolk.
6. 6
   Stir the liquid ingredients into the dry ingredients.
7. 7
   Spread the batter evenly in the pan, then sprinkle with the reserved 1/2 cup crumbs.
8. 8
   Bake until golden brown and a toothpick inserted into the center comes out clean, about 25 minutes.
9. 9
   Serve warm or at room temperature on the day of baking.
10. 10
    (The cake may be covered and frozen for up to 1 month.)