This Coffee Cake Bundt Cake has a soft crumb, a sweet-spicy ribbon of cinnamon, and a slight tang from sour cream. Baking it in a bundt pan makes it stunning, and it also gives it lots of edges and crannies to hold the sweet, crackly glaze. It’s beautiful and just as good for breakfast as it is for dessert.
Cream sugar and butter together in a large bowl using an electric mixer until light and fluffy.
Beat in eggs one at a time, ensuring each is well incorporated, and then beat in the vanilla.
In a separate bowl, whisk together the flour, baking soda, baking powder, and salt. Gradually add this mixture to the butter mixture, alternating with sour cream, briefly mixing after each addition.
Pour half of the batter into the greased bundt pan.
Make the cinnamon swirl by combining the ¼ cup of sugar with the cinnamon in a small bowl. Sprinkle this mixture over the batter in the pan.
Add the remaining batter in heaping spoonfuls over the filling.
Bake in a preheated oven at 350ºF until a toothpick inserted into the center comes out clean, 40 to 50 minutes.
Allow the cake to cool on a wire rack for 5 minutes, then carefully invert it onto a serving plate or cooling rack and let it cool completely.
While the cake is cooling, make the glaze by whisking together the powdered sugar and milk in a mixing bowl and whisk until smooth. Drizzle the glaze over the cooled cake.