In medium bowl, mix all ingredients (except marshmallow fluff and chocolate bar) until batter is smooth.

Divide batter between Silicone Waffle Form and microwave on high power 2–3 minutes or until toothpick inserted in center comes out clean.

Let rest 1–2 minutes before inverting.

Cut each waffle in half and fill with a dollop of marshmallow fluff and a piece of chocolate bar or desired filling.