Crumb Coffee Cake — A classic home-baked coffee cake with a brown sugar crumb topping and cinnamon flavor. Simple ingredients, no-fuss steps, and best served warm.
Bake time: 30–40 minutes
Pan: 13 x 9-inch
Servings: 12–15
Sour milk is milk with a little vinegar or lemon juice added. It helps baking soda work and gives a tender crumb.
Yes—use buttermilk in the same amount.
It’s done when the center is set and a toothpick comes out clean (or with a few moist crumbs).
Store airtight at room temperature for several days, or freeze slices for longer storage.