1-First Step: Prepare the oven and pan Preheat your oven to 350°F. Grease a 9×13-inch baking pan with butter or non-stick spray. This temperature ensures even baking without drying the edges. For gluten-free bakes, line with parchment for easy release. Room-temp ingredients prevent lumps later.

2-Second Step: Mix and press the crust Combine 1 box (15.25 oz) yellow cake mix, 1 stick (1/2 cup) melted unsalted butter, and 1 large egg in a bowl. Stir until a soft dough forms, about 1-2 minutes. Press evenly into the prepared pan using damp fingers or a spatula. This creates a cookie-like base. For vegan, use plant-based swaps here. Bake briefly if desired, but raw works fine.

3-Third Step: Blend the gooey filling In a large bowl, beat 2 (8 oz) softened cream cheese blocks until smooth, 1 minute. Add 4 cups powdered sugar gradually, then 2 large eggs, 2 tsp ground cinnamon, and 1 tsp vanilla extract. Mix on medium 2-3 minutes for creaminess. Fold in optional 1/2 cup pecans or raisins. Pour over crust, spreading gently. Low-cal tip: Use light cream cheese.

4-Fourth Step: Bake to perfection Bake 40-45 minutes. Edges turn golden, center jiggles slightly like cheesecake. Avoid overbaking to keep it gooey. Rotate pan halfway for even color. Cool on a wire rack 2+ hours at room temp. This sets the layers without cracking.

5-Fifth Step: Add the glaze and serve Whisk 1 cup powdered sugar, 2 tbsp milk, 1/2 tsp cinnamon, and 1/2 tsp vanilla until smooth. Drizzle over cooled cake. Chill 30 minutes for clean slices. Cut into squares. Serve at room temp for best pull-apart texture. Pairs with coffee for brunch.