Our honey bun cake is a tender, moist crumb, cinnamon delight you'll love. The icing soaks into the cake forming a glaze that complements the cake perfectly.
Arrange the oven shelf to the center position. Preheat oven to 350ºF (177ºC). Butter a 9X13 inch baking dish or spray with nonstick cooking spray; set aside.
In a small mixing bowl, whisk together brown sugar (1 cup), cinnamon (2 teaspoons), and nutmeg (1/4 teaspoon) until evenly combined; set aside.
Make Cake
Add cake mix (1 box), eggs (4), sour cream (1 container), vegetable oil (3/4 cup), and vanilla (2 teaspoons) to a large mixing bowl and mix until evenly combined.
Pour half the cake batter into the prepared baking dish. Sprinkle cinnamon sugar over the cake batter. Pour the remaining half of the cake batter over the cinnamon sugar mixture, then gently swirl the batter a few times with a knife.
Bake in the preheated oven, on the arranged oven shelf, until the top is golden and the toothpick inserted in the center comes out clean, about 28-32 minutes.
Make Icing
Add all ingredients to a medium mixing bowl and whisk to combine.
Pour the icing on the warm cake and let it cool completely before serving.