In a large bowl, combine flour, cornstarch, powdered sugar, cocoa powder, baking powder, and salt. Stir or whisk to evenly distribute ingredients and break up any lumps.
In a measuring cup or small bowl, combine coconut oil, 3 tbsp/45ml coconut cream, and vanilla.
Pour into flour mixture and stir, trying to get all powder incorporated until mixture just holds together. If too dry, add more coconut cream, 1 tsp/5ml at a time. Do not over moisten. Dough should just hold together when squeezed, but not be moist.
Gather dough into disc, cover in plastic wrap and chill for 10 minutes. Do not leave for longer as dough will become to hard to roll. If leaving dough longer, allow to come to just below room temperature before rolling.
Preheat oven to 350°F/175 C. Line baking sheets with parchment.
Between two sheets of parchment, roll out dough without adding any additional flour. Roll to 1/4”/6mm thick.
Use a 1 1/2”/4cm cookie/biscuit cutter to cut desired shapes or cut into squares with a knife.
Excess dough can be gathered up and rerolled for more cookies.
Place on prepared baking sheets with 1”/2.5cm between cookies (they do not spread much).
Bake for 8-10 minutes until just dry to touch.
Allow to cool on baking sheets for 5 minutes before transferring to a cooling rack.
Once cookies are completely cool they can be coated.
Chop chocolate finely and place in a heat proof bowl over a pot of simmering water until mostly melted. Alternatively, melt in the microwave in blasts of 15 seconds or less, stirring after each one. Allow residual heat to finish melting chocolate.
Add the coconut oil and peppermint extract and stir until smooth. Taste and adjust mint flavour. Adding extra extract (not oil based) can cause the chocolate to seize/thicken. If this happens, add more melted coconut oil, a small amount at a time, until a dipping consistency is reached.
Use a fork to dip cookies into the chocolate, shaking off the excess before placing on a parchment or wax paper lined baking sheet.
Allow to harden completely before moving to an airtight container. Can be stored for up to five (5) days at a cool room temperature or up to one (1) month in the freezer