Apple Crumb Cake

INGREDIENTS

1 cup

packed light or dark brown sugar

1/2 cup

granulated sugar

1 tbsp

ground cinnamon

1/2 tsp

salt

1 cup

(2 sticks; 230g) unsalted butter, melted

and 1/2 cups (310g) all purpose flour, spoon & leveled

1 tsp

baking soda

1/2 tsp

baking powder

1/2 tsp

salt

3/4 cup

(1.5 sticks; 170g) unsalted butter, softened to room temperature

and 1/4 cups (250g) granulated sugar

large eggs, at room temperature

1 cup

full-fat sour cream, at room temperature*

2 tsp

pure vanilla extract

and 1/2 cups peeled chopped apples (about 1 and 1/2 medium apples)

1/4 tsp

ground cinnamon

maple icing, vanilla icing, or caramel icing