The very best buttermilk coffee cake recipe, filled with sweet potatoes and fall spices, topped with a ginger crumble topping and drizzled with a browned butter glaze.

Guys, this sweet potato and rye coffee cake is SO GOOD. I often have a never ending list in my mind (and jotted down in sticky notebooks or on loose pieces of paper) of recipes that I want to develop. Sometimes they come from a photo I saw or a meal I ate, other times they just pop into my head seemingly out of nowhere. As I create content, I try to move through this list, and sometimes, a recipe idea will hang out on my list for months, while other times, I head to the kitchen and make it immediately. Which is really not fair to those long-standing little guys, like ricotta donuts, that have been hanging out on my to-do list since March, but such is life. Anyway, this sweet potato coffee cake was in the latter category. One day a couple of weeks ago, the idea popped into my head and I made it the next day. It was perfect the first time. I jotted down notes, photographed it, sent the leftovers with my husband to work and set out on the next project. But then my husband came home and some of his co-workers loved this cake so much that they wanted to special order one. So I made another. Then they special ordered another one. So I made it again. And again. Now over the last three weeks, it feels like this is the only cake I’ve baked. If that’s not a glowing review for this cake, I don’t know what is. Go make it today so I don’t have to anymore!

about the coffee cake

This is a creaming method cake, that uses solid fat (butter) so that it has a light, fluffy consistency, but, there’s a little bit of a secret weapon in the form of buttermilk. Buttermilk provides fat and moisture while also tenderizing the cake, making it ultra-moist and a little dense (like an oil-based cake). That means that this final cake is BOTH light and dense, fluffy and moist. It’s everything to everyone and I love it. The addition of rye flour gives a bit of a nutty, tangy flavor, but you could easily use 100% all-purpose flour if that’s what you had on hand. Spelt would also be a fun addition if you were feeling experimental.

I like to roast my sweet potatoes the day before so they have time to cool completely before I peel and mash them (see notes below the recipe), just make sure that everything is room temperature before mixing. This cake is a little sensitive and has a tendency to curdle up a bit if any ingredient is even a little bit too cold. If your batter does curdle, especially after adding the eggs and the sweet potato, all is not lost, just add a little of your dry ingredients. The starches will help bind everything back together.

And don’t forget the browned butter glaze, the real MVP of this whole thing. You’ll want to eat it with a spoon and I will not judge you one bit if you do.