These festive cookie bars are packed with melty chocolate chips and colorful Christmas M&Ms, featuring crisp edges and gooey centers. Quick and easy to make, they’re perfect for holiday parties, potlucks, or gifting.
For gluten-free bars, use a 1:1 gluten-free flour blend. For dairy-free, substitute plant-based butter and dairy-free chocolate chips. Do not overmix the dough for best texture. Cool bars completely before slicing for neat squares. Store in an airtight container for up to 4 days or freeze for up to 2 months.
Keywords: Christmas cookie bars, M&M cookie bars, chocolate chip bars, holiday dessert, festive treats, easy cookie bars, party dessert, kid-friendly, potluck, baking