Add all dry ingredients except peanut butter chips to a bowl and mix until combined.
Microwave peanut butter for 20-25 seconds to melt. Add honey and vanilla extract, then stir and pour over oat mixture.
Add almond milk to the mixture and using a sturdy spatula, mix and press until all ingredients are combined. All of the protein powder should be absorbed. If the mixture seems dry, add more almond milk 1 tbsp at a time, then fold in peanut butter chips.
Using a cookie scoop to help, roll the mixture into about 1" to 1 1/2" balls. Place the balls into a resealable container and refrigerate overnight before serving. They will stay fresh in the refrigerator for 7-10 days or in the freezer for about 3 months.
Notes
Make it dairy free: Swap the whey and casein with a plant based protein powder like this. Add an additional 2-4 tbsp of almond milk.
Scan the barcode below or search for "Peanut Butter and Fitness Chocolate Peanut Butter Chip Protein Energy Balls" to log this food in My Fitness Pal.