If banana bread and coffee cake had a baby, it would be this Banana Coffee Cake with Walnut Streusel. If you love bananas you’ll love this moist banana cake ribboned with brown sugar walnut streusel and topped with walnut crumble.
There’s not really much to say about this recipe other than I had a bunch of bananas that were perfectly ripe for baking and would be too mushy to eat within about a day. So I decided it was time to bake something with those bananas.
Banana bread is fine, but I wanted a breakfast type of cake and decided to turn the banana bread into a coffee cake because who doesn’t want a ribbon of streusel and a pile of brown sugar crumbs on their breakfast? Bananas and walnuts are a natural pair and I always have walnuts in the pantry so the recipe would be a Banana Coffee Cake with Walnut Streusel.
When I bake with bananas I prefer to just mash them with a fork, rather than puree them in a blender or food processor. I like to have some chunks of banana visible plus I find that when bananas are pureed they can get a little gummy.
I used a basic vanilla cake recipe as the starting point. I always use sour cream in my vanilla cake because I love the flavor and moisture it adds, plus the acidity tenderizes the cake crumb. Because I was adding bananas, which add a lot of moisture and some sweetness, I reduced the amount of eggs and sour cream in the recipe. I also reduced the sugar a little bit, not only because the bananas were sweet, but since this was a breakfast cake I wanted the cake part a little less sweet. The streusel and crumb topping also add extra sweetness.
I baked the cake in a 9″ springform pan to make it easy to unmold without disturbing the crumb topping. I also baked the same recipe as jumbo muffins. I got a dozen from the recipe. If you use a standard muffin tin you’ll probably get 18-24. Don’t overfill the muffin cups or the muffins will overrun the pan and sink in the middle. The muffin tins should only be about 1/2 full once the crumbs are added. You’re better off under filling than over filling the pans.
Just can’t get enough bananas? Try making my Banana Cheesecake with Rum Roasted Bananas.