Red White and Blue Poke Cake

Ingredients
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1 box white cake mix (plus ingredients called for on the box)
OR
Your favorite homemade white cake recipe
1 package red Jell-O (4 serving size)
1 package blue Jell-O (4 serving size)
1 tub dessert topping
OR
2½ cups heavy cream
2 tablespoons powdered sugar

Instructions
Prepare and bake cake in a 9x13 pan according to package directions or recipe.
Let cake cool 15 minutes. Using a chopstick or similar tool, poke holes all over the cake (I did 15 rows of 12).
Mix red Jell-O with ¾ cup boiling water until dissolved. Add ½ cup cold water. Pour red Jell-O into every other row of holes.
Repeat with blue Jell-O. Cover and refrigerate 4 hours or overnight.
If using, whip heavy cream & powdered sugar on medium until stiff peaks form. Spread over cake. Keep refrigerated until serving.

Note
Source recipes -Here-