Combine the cocoa powder, hot cocoa mix, granulated sugar, and vegetable oil in a bowl.
Once combined beat in the eggs and vanilla.
In a medium bowl, combine the all-purpose flour, baking powder, and salt.
Blend the dry ingredients into the wet ingredients until all ingredients are moistened. The dough will be very sticky.
Cover the bowl with plastic wrap and place in the refrigerator overnight or in the freezer for at least 4 hours.
Preheat the oven to 350°F and line cookie sheets with parchment paper.
Roll the cookies into 1-inch balls or use a #40 cookie scoop and roll in the powdered sugar.
Place 2 inches apart on cookie sheets and bake for 9-11 minutes.
Remove from the oven and immediately place a peppermint patty into the center of each cookie.
Allow the cookies to cool completely before transferring them to a storage container or serving.
Notes
TIP: Place the cookie dough back into the refrigerator between baking. Approximately 15 snowflake peppermint patties come in a bag. You will need more than 1 bag to top these crinkle cookies. Regular peppermint patties are easier to find and the taste will be the same.