Line a baking sheet with parchment and set aside.
Warm peanut butter, honey, and coconut oil in a microwave-safe bowl for 20–30 seconds; stir until smooth.
Combine oats, ground flaxseed, cinnamon, and salt in a large mixing bowl.
Pour the warm peanut mixture over the dry ingredients and stir until everything is evenly coated.
Let the mixture rest for 5 minutes so the oats hydrate and thicken.
Fold in mini chocolate chips and chopped peanuts.
Scoop 1 to 1.5 tablespoon portions, squeeze to compact, then roll into balls.
Arrange on the lined sheet and chill until firm, about 30 minutes.
Enjoy right away or store chilled for best texture.