Prepare cake according to package directions, making one 8” round cake and 12 cupcakes. Cool completely. Save the cupcakes for later and slice the round cake in half, creating 2 rounds.
15.25 oz Red Velvet cake mix
Place one round into the bottom of a trifle dish.
Mix together pudding and milk and whisk well until combined. Refrigerate for 5 minutes or until set. Spread half of the pudding on top of the cake in the bowl. Top with half of the whipped topping. Crush 10 cookies and put on top of whipped topping. Repeat layers, ending with crushed cookies. Mix together corn syrup and a dollop of red food color gel. Add a dab of black to make the red more of a realistic blood red color.
3 oz instant chocolate pudding, 2 cup milk, 20 fudge covered graham crackers, 8 oz whipped topping, ¼ cup corn syrup, No-Taste Red Food Coloring Gel, Black Food Coloring
Dredge one end of the bone into the corn syrup and push it into the top of the trifle. This allows for some “blood” to seep out from where the bone protrudes from the trifle. Repeat with desired number of bones and drizzle top with remaining blood, pouring it on the bones. Cover and refrigerate until ready to serve.
Remove the plastic bones before serving.
Notes
I suggest making candy bones or using bone sprinkles. The blood doesn't stick to the plastic very well and you have to make sure you remove all the plastic before serving. Since we only use one 8" round in the trifle, make cupcakes so you don't waste batter.