Preheat the oven to 350 degrees Fahrenheit and line baking sheet with parchment paper or spray with non-stick cooking spray.
Add 1 cup of chocolate chips to a microwave safe bowl and microwave at 30 sec intervals, stirring between each. Keep doing 30 seconds and stirring until melted and smooth.
Add 6 tablespoons butter, 1 cup sugar, 2 teaspoons vanilla, 1 teaspoon peppermint to a mixing bowl. Use mixer to cream on medium speed for 2 - 3 minutes.
Add in 2 eggs and mix on medium speed until well combined.
Add in melted chocolate and mix on medium until combined.
Add in 1.5 cups flour, 1.5 teaspoons baking powder and .5 teaspoon salt and mix on medium/low. Scrape down sides as needed and continue mixing until well combined.
Add remaining 1 cup of chocolate chips and fold into dough.
Use a tablespoon or small cookie scoop to scoop out 1 - 1.5 tablespoon sized balls of dough.
Roll into a ball and roll in powdered sugar.
Place on baking sheet a few inches apart.
Bake for 10 - 12 minutes or until edges are set.
Notes
Tips
To enhance flavor add peppermint extract to chocolate chips and allow them to soak for a few hours to overnight.
Add toppings like drizzled chocolate and crushed peppermint candies.
Use cocoa powder instead of melted chocolate chips.
Don't overbake cookies - make sure edges are set. Center will continue to bake and set as they cool.
Store
They can be kept in an airtight container in the refrigerator for 3 - 5 days.
Or, they can be frozen for 3 - 6 months. Defrost in the fridge or countertop overnight. Or microwave at 15 second intervals for a warm cookie.