This super delicious, minty mousse with a perfect chocolate crust, is one of the best Grasshopper desserts, and it's lovely for St. Patrick's Day.
Add the cookies to a food processor fitted with the blade attachment and process until they're a fine crumb. Pour this mixture into a medium-sized mixing bowl and add the melted butter. Mix until it's evenly blended.
Evenly divide the cookie crust mixture among 8 (8-ounce) ramekins, and gently press it onto the bottom surface. Set aside on a baking sheet (for easy transportation around the kitchen).
Pour the heavy cream into a large, deep mixing bowl and use an electric mixer to whisk on high speed until medium to stiff peaks form, about 1 minute. (Do not over whip!)
Just before serving, break up each of the After Eight mints into small pieces and garnish each one with them, and top them off with a mint leaf.