01 - Add almond milk, protein powder, peppermint extract, cocoa powder if using, honey or maple syrup if using, frozen banana, and ice cubes to a blender.
02 - Blend on high speed until the mixture is completely smooth and creamy, approximately 30 to 60 seconds.
03 - Taste the shake and adjust sweetness or peppermint intensity as desired, then blend briefly to incorporate any additions.
04 - Pour into a tall glass and serve immediately. Garnish with fresh mint leaves or dark chocolate shavings if desired.