Christmas M&M Cookie Bars

Christmas M&M Cookie Bars Recipe

If your calendar looks anything like ours, December is looking much like a blur of end of year and Christmas celebrations! Not that it is my social life filling the boxes, it’s all related to the kids school and after school commitments. Of course, many events require us to bring a plate so a great take-a-plate holiday recipe is a must! When I saw the recipe for Loaded M&M Oreo Cookie Bars on the Averie Cooks blog I was inspired – what a fun and festive plate for a kids event. I made a few tweaks to the recipe and swapped things out to suit our Australian metric measuring system (head over to the original recipe for US measurements).

Christmas M&M Cookie Bars Recipe

Not only is it great as it, this is also a great recipe to experiment with. As long as you keep the base ingredients the same, you can use whatever addins you like. Don’t like Oreos? Use your favourite icing filled biscuits. Don’t have M&Ms? Use choc bits or chopped cooking chocolate. Add broken pretzels for a salty crunch.

Christmas M&M Cookie Bars Recipe


Christmas M&M Cookie Bars
Save Recipe


  • ½ cup unsalted butter (125g), melted and cooled
  • 1 large egg, lightly beaten
  • 1 cup raw sugar
  • 2 teaspoons vanilla extract
  • 1 cup plain (all purpose) flour
  • 180g Oreo cookies (approx. 18), roughly chopped
  • ½ cup M&Ms - Christmas coloured ones if you can get them


  1. Preheat oven to 175˚C.

  2. Line a 20cm square baking tin with aluminium foil and spray with a cooking spray.

  3. Place cooled butter, egg, sugar and vanilla in a large mixing bowl and stir until smooth.

  4. Stir in the flour, mixing until it is just combined. You don’t want to overdo it.

  5. Add the Oreos and half of the M&Ms and stir until mixed in. Keep the other half of the M&Ms aside to decorate the top of the bars.
  6. Pour the batter into the prepared baking tin. Use a spatula to push the batter into the corners of the tin and smooth the top.

  7. Sprinkle the M&Ms you kept back over the top of the bars.

  8. Bake for approximately 18 to 20 minutes or until the top is set in the middle. If you can find a spot with just batter test with a skewer to see if the bars are cooked. If the skewer comes out clean you know the bars are done. The bars will become more firm as they cool.
Cool in the tin on a wire rack.

  10. Turn out and slice into bars for serving.

Your might also like to try our great take-to-share Angel Cupcakes!

angel cakes 2

Get every post via email Get the monthly newsletter

Leave a Comment