In a large bowl, stir together peanut butter, maple syrup, and vanilla until smooth.

Add protein powder, hemp seeds, chia seeds, crushed peanuts, and almond flour if using. Mix until a thick, uniform dough forms.

Press the mixture firmly into a parchment-lined 8x8 inch pan, smoothing the top.

Melt the chocolate and coconut oil together, either in a saucepan over low heat or in the microwave in short bursts.

Pour the chocolate topping over the bar base and spread it evenly with a spatula.

Chill in the fridge for at least 1 hour, or until firm.

Once set, slice into bars and store in the fridge or freezer.