Muddy Buddies Cupcakes

package (15.25 ounces) Betty Crocker Chocolate Fudge Cake Mix

package (3.9 ounces) chocolate fudge pudding mix, (dry, do not prepare)

large eggs, (at room temperature)

vegetable oil

full fat sour cream

and 1/2 teaspoons vanilla extract

buttermilk, (or sub scant 1/2 cup milk + 1/2 tbsp vinegar- mixed together and let sit for 5 minutes)

creamy peanut butter, (not a natural or no-stir version)

butter, (at room temperature (do not sub margarine; do not melt))

vanilla extract

powdered sugar

milk

Rice Chex cereal

milk chocolate chips

and 1/2 tbsp creamy peanut butter

butter

vanilla extract

powdered sugar