Pour the batter into your prepared pan and smooth the top with the spatula.
Drizzle the cinnamon-sugar butter mixture evenly over the entire surface.
Use a knife or a toothpick to gently swirl the topping into the batter, creating beautiful marbled patterns.
Step 7: Bake to Perfection
Bake for 25-30 minutes, or until the edges are golden and a toothpick inserted into the center of the cake comes out clean.
Step 8: Cool and Serve
Let the cake cool in the pan on a wire rack for at least 15 minutes.
Carefully run a knife around the edge, then invert the cake onto the rack, remove the parchment paper, and flip it right-side-up to cool completely.
Slice and serve at room temperature for the best flavor and texture.
