Cinnamon Coffee Cake is moist, tender and buttery, topped with a sweet cinnamon streusel. Served alongside a piping hot cup of coffee or tea, this cake makes a delicious breakfast treat or afternoon snack!
Preheat oven to 350 degrees F. Grease a 9x13-inch pan and set aside.
Prepare the Batter - In a large bowl whisk together the flour, baking powder and salt. Set aside.
In the bowl of a stand mixer fitted with the paddle attachment, or in a large mixing bowl with an electric mixer, beat the butter and sugars on medium speed until light and fluffy; about 5 minutes.
Add in eggs one at a time, scraping down the bowl as necessary. The batter will appear to be a bit curdled, but it will come together once fully mixed.
Add in the sour cream and vanilla extract and mix until evenly incorporated.
Gradually add in the flour mixture and mix on low speed until combined; scraping down the sides of the bowl as needed.
Prepare the filling and topping - In a medium mixing bowl, use a fork to combine the flour, brown sugar, cinnamon and melted butter. You’ll want this to be slightly clumpy for those yummy pieces of crumbs. Set aside.
Evenly spread half the batter into the prepared pan. Sprinkle half of the filling/topping mixture over the batter. Top with remaining batter and spread evenly. Finish with the remaining filling/topping mixture.
Bake in preheated oven for 45-50 minutes. Allow coffee cake to cool completely before drizzling on the glaze.
Prepare the Glaze - In a small bowl, whisk together the powdered sugar, melted butter, vanilla and 1 tablespoon milk. You want the glaze to be thin enough to drizzle over the cooled cake, but not watery. If the glaze is too thick after adding in the first tablespoon of milk, gradually add in a little more milk, ½ teaspoon at a time until you reach the desired consistency. Drizzle topping over cooled cake.
Notes
The cake is delicious served at room temperature, but even yummier when slightly warmed in the microwave before serving with a piping hot cup of coffee!Makes 1 9x13-inch pan.