In a large mixing bowl, combine the rolled oats, peanut butter, and honey or maple syrup. Stir until the mixture comes together and becomes compact.. 

Divide into two equal parts. Add vanilla protein powder to one part and mix until fully combined. Add chocolate protein powder to the other half and mix until well combined.

Chocolate Chip: add chocolate chips to the vanilla base and stir until well combined.

Oatmeal Raisin: mix the vanilla base with cinnamon and raisins 

Chocolate Peanut Butter: add chocolate chips to the chocolate protein base and stir to combine.

Monster Cookie: combine the chocolate protein base with M&M’s 

Use a spatula to mix the ingredients roughly until combined, then knead the mixture with your hands until you get a compact dough that’s easy to shape into balls.

Scoop the mixture with a spoon, then roll it into balls with your hands. You should get about 24–25 balls.