• Preheat waffle iron to medium-high (if applicable). In a mixing bowl, whisk together melted butter, sugar, eggs, cocoa powder and vanilla. Add flour and stir just until combined.
• Spray the waffle iron with cooking spray and drop one Tablespoon of batter in the center of each waffle grid. Bake about 4 minutes.
• Use a fork to carefully remove cookie. It will be very soft right out of the iron, but after it cools, it will firm up and become slightly crispy. Cool completely on a cooling rack.

Chocolate Glaze

• In a small saucepan, heat butter and water over low heat until melted. Stir in the cocoa powder and remove from heat. Whisk in the powdered sugar and vanilla until no clumps remain.
• Drizzle each cookie with chocolate glaze before serving.