Ingredients
Equipment
Method
- Preheat oven to 350°F and grease a 9x13 inch baking pan with butter, then lightly flour it so the cake releases easily.
- Whisk together flour, sugar, baking powder, and salt in a large bowl until well combined with no lumps.
- In a separate bowl, whisk together milk, eggs, vanilla, melted butter, and sour cream until smooth and well blended.
- Pour wet ingredients into dry ingredients and stir gently just until combined with no dry flour streaks, being careful not to overmix.
- Mix brown sugar, cinnamon, and melted butter in a small bowl until it forms a thick spreadable paste.
- Pour half the batter into prepared pan and spread evenly, then drop spoonfuls of cinnamon filling over it.
- Use a butter knife to swirl the cinnamon through the batter in figure-eight motions without mixing completely.
- Pour remaining batter over swirled layer, drop more cinnamon filling on top, and swirl again with a knife.
- Bake at 350°F for 35 to 40 minutes until golden and a toothpick has moist crumbs, then cool for 5 minutes.
- Whisk powdered sugar, milk, and vanilla until smooth, then drizzle over warm cake and serve.
Nutrition
Notes
Store covered at room temperature up to 3 days. Don't overbake or the cake turns dry; pull it when a toothpick has moist crumbs instead of coming out completely clean.









