Prepare pudding according to package. Allow to cool and thicken.

Begin layering parfaits. Add two Nilla Wafers to the bottom of each cup.

Next, add a layer of vanilla pudding, followed by a layer of Cool Whip, and banana slices.

Repeat with another layer of vanilla pudding and pipe a layer of Cool Whip on top.

Chill parfaits in the fridge while you prepare the Halloween cookie toppers.

In a small pot, melt the white chocolate chips over low heat. Stir until melted completely.

Sandwich a banana slice between two Nilla Wafers. Gently push each cookie together to squish the banana a little bit. That will help it stick to each side of the cookie.

Then, carefully dip the cookie sandwich into the white chocolate. Use a spoon to flip the cookie sandwich in the chocolate. Once fully coated, remove and place on wax paper.

Place the chocolate-covered cookie sandwich in the fridge until hardened.

Meanwhile, melt semi-sweet chocolate over low heat. Stir until melted.

Remove chocolate-covered cookie sandwiches. With a small decorating brush, use semi-sweet chocolate to decorate the chocolate-covered cookie sandwiches with ghost and skeleton faces.

Place cookies back in the fridge to harden.

Sprinkle parfaits with Halloween sprinkles. Then, place a chocolate-covered sandwich cookie on top.

Chill in fridge until serving.