This delicious sourdough discard coffee cake features a tender crumb, warm cinnamon flavors, and a buttery streusel topping. Perfect for breakfast or brunch, it’s a cozy, crowd-pleasing treat that makes the most of your starter.
Pour half of the cake batter into a loaf pan, and spread it evenly. Cover the batter entirely with half of the cinnamon streusel. Layer the remaining cake batter on top of the streusel and then finish it off with the remaining streusel. There will be two cake layers and two streusel layers total.
Bake on the middle rack of your preheated oven for 55 to 60 minutes. You'll know when the cake is ready when it is lightly firm on top and the coffee cake doesn't jiggle when you wiggle the pan slightly.
While the cake is cooling, make your glaze by mixing powdered sugar, vanilla, and milk.
1 cup powdered sugar, ½ teaspoon vanilla extract, 2 tablespoons milk
Allow it to cool completely before topping with the glaze. I recommend letting the glaze to set before serving for best results.
Notes
Weigh your ingredients for best results! I can't recommend this enough. Kitchen scales are easy to find, affordable, and beneficial to your baking journey. It is the best way to make sure your recipes turn out as accurately as possible. See my "equipment" section above for links to scales I recommend.
Don't over-mix your batter! Overmixing can negatively affect the rise of your cake, making it more dense.
For best results, store in an airtight container refrigerated or at room temperature for 3-5 days. Sourdough coffee cake can be frozen for up to 3 months, however, the streusel will be significantly softer after being thawed. It will be very yummy still, though!