Prepare cake according to package directions. Spread into a 9x13 glass baking dish coated with cooking spray and bake for 2 minutes less than package directions.
Remove from the oven and poke generously with the end of a wooden spoon or a straw. Make many holes. The more holes, the more space for the delicious pudding to hide.
Although the cake to cool slightly. Meanwhile whisk together pudding mix with skim milk. It will be liquidy, but will start to thicken as you whisk. It will take about 2 minutes. When you start to feel resistance allow to stand for 2 minutes. Stir in orange gel food coloring.
Pour pudding mix over cake, patting down into the holes. Use a toothpick and prick more holes into the cake and pudding. Tap the whole dish several times to allow the pudding to settle into the cake.
Put Oreo cookies into a large freezer bag and crush with a rolling pin. Or place cookies into a food processor and pulse until cookies are crumbled.
Spread Oreo crumbles over pudding layer and pat down, top with edible glitter.
Cover with aluminum foil and allow to set in the refrigerator for at least one hour.
Keep cake refrigerated for up to 3 days.
If you've tried this recipe, come back and let us know how it was!