01 - Preheat oven to 350°F. Grease a 9x13 inch baking pan thoroughly with cooking spray or butter.
02 - In a large bowl, combine red velvet cake mix, eggs, vegetable oil, buttermilk, and vanilla extract. Beat with electric mixer on medium speed until completely smooth, about 2 minutes.
03 - Pour the cake batter evenly into the prepared baking pan, spreading into an even layer with a spatula.
04 - In a separate medium bowl, beat softened cream cheese and butter together until creamy and well-combined. Gradually add powdered sugar and vanilla extract, continuing to beat until fluffy and smooth.
05 - Drop large spoonfuls of the cream cheese mixture randomly over the surface of the cake batter, leaving some gaps between dollops.
06 - Using a butter knife or skewer, gently swirl the cream cheese mixture through the batter in a figure-8 or circular motion. Do not overmix—distinct swirls should remain visible.
07 - Sprinkle chocolate chips, chopped pecans, and shredded coconut evenly over the entire surface, pressing lightly into the batter.
08 - Bake for 38–42 minutes until edges are set but center still appears slightly gooey. The cake should have a few moist spots but not be undercooked. Do not overbake as the gooey texture is desired.
09 - Allow cake to cool in the pan for at least 30 minutes before slicing. Serve warm for maximum gooeyness or refrigerate for a firmer, more structured slice.