Crush peppermint to a coarse texture to prevent it from melting too quickly. Use a dry spoon to scoop mix to avoid clumping. Store jars upright and avoid shaking before use to keep layers distinct. Warm milk before adding mix and stir vigorously for best flavor. Optional additions include cinnamon, vanilla extract, or cayenne for spice. For vegan version, use coconut sugar, dairy-free milk powder, and vegan chocolate chips.