01 - Preheat oven to 350°F. Grease a 9x13 inch baking pan.
02 - In a large bowl, combine red velvet cake mix, eggs, oil, buttermilk, and vanilla. Mix until smooth.
03 - Pour the cake batter evenly into the prepared pan.
04 - In a separate bowl, beat cream cheese and butter until creamy. Add powdered sugar and vanilla, beating until fluffy and smooth.
05 - Drop spoonfuls of the cream cheese mixture over the cake batter.
06 - Using a knife or skewer, gently swirl the cream cheese mixture through the batter to create a marbled effect.
07 - Sprinkle chocolate chips, pecans, and coconut evenly over the top.
08 - Bake for 38–42 minutes, or until the center is mostly set (a few gooey spots are fine—do not overbake).
09 - Cool in the pan for at least 30 minutes before slicing and serving.