Ingredients
Method
- Preheat your oven to 350°F. Spray a 9x13-inch baking dish with nonstick cooking spray.
- In a large bowl or stand mixer, combine flour, sugar, baking powder, eggs, vanilla extract, and milk.
- With the mixer running on medium-low speed, slowly pour in the melted butter. Mix until just combined (don't overmix).
- Pour the batter into your prepared baking dish and spread evenly.
- In a small bowl, combine softened butter, brown sugar, flour, and cinnamon. Mix until smooth and well combined.
- Drop spoonfuls of the cinnamon filling across the entire surface of the cake batter.
- Using a butter knife, create swirl patterns by dragging the knife through both the filling and batter. Make sure to reach the bottom of the pan.
- Bake for 35-40 minutes, until a knife inserted in the center comes out clean. The edges should be golden and pulling slightly from the pan sides.
- While the cake bakes, whisk together powdered sugar, milk, and vanilla extract in a small bowl to make the glaze.
- Pour the glaze over the warm cake immediately after removing it from the oven.
- Let the cake cool for 15-20 minutes before slicing, or serve warm.
Notes
Store covered at room temperature for up to 3 days. Freezes well for up to 3 months when wrapped properly. The filling can be made with 1 stick of butter instead of 1½ if you prefer less richness. Adjust glaze consistency by adding more milk (thinner) or powdered sugar (thicker).
