I kinda made this up as I went along. They are SO good!
1 pkg yellow cake mix
1 pkg instant pudding (I used chocolate)
Prepare cake mix according to directions (add the eggs/oil/water, everything) and mix in the pudding powder.
In muffin tin, place cupcake liners in each cup, then place 1 large marshmallow in each cup. Pour batter over the marshmallow about 2/3 full.
Bake at 350 for 12 minutes or until the marshmallow begins to brown slightly as seen above.
Serve warm while still gooey. Mmmm.