01 -
Follow package directions to prepare yellow cake mix. Pour batter into a greased 9×13-inch baking pan and bake until golden and springy to touch.
02 -
While cake is warm, use wooden spoon handle to poke holes at 1-inch intervals across surface, pressing to bottom.
03 -
Whisk both pudding mixes with 4 cups cold milk for about 1 minute until smooth, working quickly before it sets.
04 -
Pour pudding over cake, filling each hole completely. Use back of spoon to press pudding into holes for full coverage.
05 -
Refrigerate for at least 2 hours to allow pudding to set and integrate with cake.
06 -
Microwave chocolate frosting for 10–15 seconds until just pourable, smooth but not runny.
07 -
Spread softened frosting evenly over chilled cake, starting from center outward.
08 -
Let frosting set briefly at room temperature, then refrigerate for 2 hours or overnight for best texture.