Line a 13x9-inch baking dish with baking parchment.
Mix oats, flaxseed meal, raisins, cranberries, and protein powder together in a small bowl.
Combine chocolate chips, honey, and peanut butter together in a microwave-safe bowl; heat in microwave oven, stirring every 30 seconds, until the chocolate chips are nearly melted, 2 to 3 minutes.
Stir oats mixture with the chocolate mixture until evenly mixed; spread into prepared baking dish.
Refrigerate bars until hardened, 15 to 20 minutes. Remove bars from dish by lifting parchment; cut into squares using a pizza cutter.
