Line a baking sheet with parchment paper or silicon baking mat
Crush the 16 Thin Mint cookies using a food processor until finely ground.
Cream butter and sugar in a stand mixer until fluffy and pale
Add salt, baking powder and mix until incorporated
Add vanilla extract and Mint Kahula (if not using Kahula, substitute for 2 tsp. of vanilla extract)
Add the 2 eggs one at a time mixing well in between
Add the 2 cups of flour one at a time with your stand mixer on stir. Fully mix each cup before adding more.
The dough will be sticky. Using a rubber spatula or your hands break the dough evenly in half. Shape the dough into thin rectangular logs. The dough should be aprx. 1 inch tall. Use your spatula to smooth the tops of the logs.
Bake for 25 minutes. Remove and cool on the pan for 10 minutes.
Once cool enough to touch, take a long serrated knife and cut the biscotti into 1/2 inch pieces on a diagnol. If the biscotti crumbles, take a damp paper towel and lightly dampen the surface of the biscotti, this will make cutting it easier as biscotti tends to crumble slightly.
Spread out the biscotti so they are not touching and place back in oven for 25 minutes. They should be golden brown on the outside.
Allow to cool completely and dip into melted chocolate.
Notes
I like to have a combination of plain, dipped in chocolate and chocolate with sprinkles. I personally prefer the chocolate dipped.