Step 1

Line a 9x11-inch baking pan with parchment paper, leaving a 2-inch overhang on two sides.

Step 2

Place peanut butter, protein powder, and honey in a large bowl; mix with a wooden spoon to combine. Add goji berries, flax seeds, and oats, stirring well to combine. Spread mixture evenly in baking pan.

Step 3

Place baking pan in the refrigerator and chill until mixture is set, about 1 hour. Lift out of the baking pan; cut into 3-inch squares.