Gather all the ingredients in preparation for your baking session.
In a large bowl, combine the flour, cocoa powder, corn starch, baking powder, and salt. Mix these dry ingredients until well incorporated.
In a separate, smaller bowl, cream the butter until smooth. Then, add the brown sugar, granulated sugar, egg, vanilla extract, and mint extract, stirring until the mixture is well blended.
Gradually add the dry ingredients mixture into the butter mixture, making sure they are thoroughly combined.
Stir in the chocolate drops into the dough. Once combined, allow the dough to cool for about 1 hour.
While the dough is cooling, preheat your oven to 180 degrees Celsius (350 degrees Fahrenheit).
After the dough has cooled, shape it into cookies and place them on a baking sheet. Bake for 9-12 minutes until the cookies are set around the edges.
While the cookies are cooling after baking, prepare the chocolate dip. Melt the chocolate drops and mix in the canola oil for a smooth, glossy finish.
Dip each cooled cookie halfway into the melted chocolate, then sprinkle the dipped part with the crushed lollipop. Allow the chocolate to set before serving.