1-First, preheat your oven to 350°F and lightly grease a 9×13-inch baking dish. This step gets things ready for even baking and prevents sticking.

2-Next, in a large bowl, combine the eggs, oil, milk, and vanilla extract. Mixing these wet ingredients first helps them blend well for a smooth batter base.

3-Then, in another bowl, whisk together flour, granulated sugar, baking powder, and salt. This dry mix ensures all the powders distribute evenly.

4-After that, add the dry ingredients to the wet ones and mix well. Be gentle to keep the batter from getting tough.

5-Now, pour half of the batter into the prepared baking dish. This creates the first layer for that signature swirl.

6-In a medium bowl, mix the brown sugar and cinnamon, then sprinkle half of this mixture evenly over the batter. It’s what gives the cake its delicious cinnamon hit.

7-Carefully pour the remaining batter on top, followed by sprinkling the rest of the cinnamon sugar mixture and drizzling the melted butter evenly. This builds the layers that make every bite special.

8-Finally, bake for 35 to 40 minutes, or until a toothpick inserted in the center comes out with a few moist crumbs. Total preparation time is 55 minutes, with 15 minutes for prep and 40 for baking. Let it cool a bit before serving warm it’s best that way!