This Sweet Potato Cinnamon Coffee Cake is tender, scrumptious, and healthified with plenty of sweet potatoes. The cream cheese icing is delectable. Perfect weekend brunch treat!
Preheat oven to 350F with rack on lower middle position. Grease a 13x9 baking pan and set aside.
In a large bowl, combine both flours, baking powder, sugar, cinnamon, nutmeg, and salt. Whisk to combine well. In a separate bowl, whisk the sweet potatoes, milk, eggs, vanilla, and melted butter to fully combine. Use a rubber spatula to fold the flour mixture with sweet potato mixture gently; don't over mix. Level the batter into the greased baking pan.
To make the Topping: In a bowl, mix toether all topping ingredients until incorporated. Drop evenly on top of the cake batter, in small clumps. Bake cake about 35 minutes or just until a toothpick inserted in the center comes out with a few tender crumbs attached (be sure to check the cake portion, not the portions with melted butter, to get correct testing results.) Remove cake and let cool slightly while you make the frosting.
To make Frosting: In a small bowl, mix together all frosting ingredients until it reaches a thick drizzle consistency. Glaze the warm cake. Cake is best served warm.
Notes
* I like to roast my sweet potatoes ahead of time, even the day before, so it's ready to go. Wrap potatoes in foil, bake at 400F for 1-1.5 hours or until tender. Let cool, peel, and mash. * This cake is best served warm. You can make it ahead of time and rewarm it before serving. Either drizzle with frosting just before serving or frost ahead of time and just be sure you don't overheat when re-warming the cake. * The buttery topping may seem liquidy on top of the cake when it's done baking; it will settle deliciously into the cake as it cools.