Crumb Topping Using your hands, mix equal parts brown sugar and flour with half as much unsalted butter (e.g. 1/2 C brown sugar, 1/2 C flour, 1/4 C butter). It should stick together and form crumbs. Spread the mixture onto a baking sheet lined with parchment paper. Bake at 350 F for 20 minutes. Crumble any pieces that stuck together and put the crumbs on everything in sight!
Soft and light coffee cake muffins are topped with a crumbly, buttery streusel overflowing as you pull them out of the oven. They’re explosions of flavor in your mouth. And the best part is you can eat them for breakfast. With coffee.