Prep the pan: Line an 8x8-inch pan with parchment, leaving overhang for easy lifting. Lightly mist with oil if your parchment tends to stick.
Mix the base: In a bowl, stir almond flour, protein powder, cocoa, sweetener, and salt.
Add almond butter, melted coconut oil, almond milk, and vanilla. Mix until a thick, slightly tacky dough forms. If it’s crumbly, add 1 tablespoon almond milk at a time.
Press and chill: Press the base evenly into the pan.
Compact well with the back of a spoon. Chill in the fridge while you make the mint layer.
Make the mint cream: In a clean bowl, whisk yogurt, vanilla protein, sweetener, peppermint extract, and melted coconut oil. Adjust sweetness and mint to taste.
Add a tiny amount of coloring if you want a green tint.
Layer and set: Spread the mint mixture over the base. Smooth the top. Chill 30–45 minutes until set and no longer sticky.
Melt the chocolate: In a heat-safe bowl, microwave chocolate and coconut oil in 20–30 second bursts, stirring between each until smooth.
Don’t overheat.
Coat the bars: Pour the chocolate over the chilled mint layer. Tilt the pan to coat evenly. Sprinkle flaky salt if using.
Final set: Chill 30–45 minutes until the chocolate is firm to the touch.
Slice: Lift the slab out with the parchment.
Warm a sharp knife under hot water, dry it, and slice into 12–16 bars. Wipe and rewarm the knife as needed for clean cuts.