In a large mixing bowl, combine peanut butter, protein powder, maple syrup or honey, and salt. Mix until a thick, cohesive dough forms, about 2-3 minutes.

Transfer the mixture to an 8x8 inch pan lined with parchment paper and press evenly into the pan.

For optional chocolate coating, melt chocolate chips and pour over the pressed mixture, spreading evenly.

Chill the pan in the refrigerator for about 30 minutes to set.

Once set, remove from the refrigerator and cut into desired sizes. Store in an airtight container.