01 -
In a mixing bowl, stir together peanut butter, maple syrup, protein powder, oats, cocoa powder, and chia/flax until thick and sticky. Press firmly into a parchment-lined 20x20 cm pan.
02 -
Pour melted dark chocolate evenly over the base. Drizzle warmed peanut butter on top, then swirl with a toothpick or skewer for a marbled effect.
03 -
Refrigerate for at least 2 hours, or until firm. Slice into 12 neat squares.
04 -
Keep in the fridge up to 1 week or freeze up to 2 months.