These chewy monster cookie bars are loaded with peanut butter, oats, and chocolate chips, topped with playful candy eye sprinkles for a fun and delicious treat perfect for parties or snacks.
Press candy eyes gently into warm bars immediately after baking to prevent melting or sliding off. Use old-fashioned oats for best chewy texture. If edges brown too quickly, loosely cover pan with foil halfway through baking. Room temperature eggs and butter improve batter consistency. Bars can be frozen for up to 2 months; thaw overnight before serving.
Keywords: monster cookie bars, chewy cookie bars, candy eye sprinkles, peanut butter cookie bars, easy cookie bars, kid-friendly dessert, Halloween treats