So, if you want an easy at-home recipe for a killer chocolate treat, learn how to make homemade Kit Kat bars with just three simple ingredients: milk chocolate, coconut oil, and crispy wafer cookies.

Line a baking sheet with parchment paper. Melt the milk chocolate over a double-boiler. Cut each wafer cookie in ½ vertically (so that they’re long and thin). Dip the bottom of each wafer ...