Common Questions
Why is it called coffee cake if there is no coffee in it?
Because it is meant to be eaten with coffee, not necessarily made from coffee. Although I fully support adding espresso powder to the streusel if you want a mocha moment.
Can I make this without sour cream?
Yes. Use full-fat plain Greek yogurt 1:1. In a pinch, you can use buttermilk, but the batter will be looser and the crumb slightly less rich.
How do I keep the streusel from sinking?
Two things help: make the streusel chunky and keep the middle layer as a sprinkle, not a solid packed blanket. Also, spread a thin layer of batter under it and a thicker layer on top so it is “suspended” rather than dropped in. For the top, you can very lightly pat the streusel just so it sticks, but do not compact it.
Can I bake this in a Bundt pan?
You can, but it is trickier to keep the streusel in a clean ribbon. If you try it, use a well-greased 10 to 12 cup Bundt pan and plan on roughly 45 to 60 minutes, checking early and often. Bake times vary a lot by pan shape and color, so use the doneness cues below. I prefer a 9x9 for predictable slices and maximum crumb topping coverage.
How do I know it is done?
Go by the look and the toothpick first: the top should be golden and a toothpick inserted in the cake portion (not straight through the streusel) should come out with a few moist crumbs, not wet batter. If you like an extra check, many cakes land around 195°F to 205°F in the center, but consider that range a helpful guideline, not a rule.