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5 from 2 votes

Mars Bar Cookies

Mars Bar pieces are stuffed into these thick chocolate chip cookies for an amazing cookie surprise!
Prep Time10 minutes
Cook Time16 minutes
Chilling Time15 minutes
Total Time41 minutes
Course: Dessert, Snack
Servings: 18 cookies

Equipment

  • 1 Cookie Sheet
  • parchment paper to line the sheet

Ingredients

  • 1 cup unsalted butter, room temperature (227g)
  • 1 cup dark brown sugar (156g)
  • ¼ cup granulated sugar (50g)
  • 1 large egg, plus 1 additional egg yolk
  • 2 teaspoons vanilla extract
  • 1 teaspoon baking soda
  • ½ teaspoon fine sea salt
  • 2 ½ cups all-purpose flour (300g)
  • 1 cups semi-sweet chocolate chips (170g)
  • 2 Mars Bar chocolate bars, chopped into small pieces (about ½ cup)

Instructions

  • Heat oven to 375F (190C). Line cookie sheet with parchment paper.
  • Chop the Mars Bars into small pieces and set aside.
  • In the bowl of a stand mixer (or using a handheld mixer), cream room temperature butter and brown and granulated sugars together on medium speed until smooth, about 2 minutes.
  • Add the egg and egg yolk, vanilla, baking soda and salt and continue to cream for 1 minute.
  • Remove the bowl from the stand mixer and gently fold in the flour until just combined.
  • Fold in the chocolate chips.
  • Chill the dough in the fridge, covered with plastic wrap for 15 minutes to make it easier to stuff.
  • Remove the bowl from the fridge and scoop out 1 tablespoon of dough. Flatten it in the palm of your hand. Drop a few pieces of Mars Bar onto the dough then scoop out another tablespoon of dough and cover the Mars Bar pieces. Press into a ball taking care to cover all of the chocolate bar pieces.
  • Bake on the parchment lined cooking sheet on the centre rack of the oven. Start checking the cookies at 12 minutes. They can take anywhere from 12 - 17 minutes to bake depending on your oven. Look for smooth golden tops.

Notes

  1. Ingredients at room temperature. Before you start creaming the butter, sugar, and eggs, make sure all of your ingredients are at room temperature. It makes it so much easier to achieve a smooth cookie dough.
  2. As tempting as it may be, don’t overload the cookies with Mars Bar pieces. If you stuff them too full, the chocolate bar pieces may ooze out of the middle.
  3. If your cookies come out of the oven in an unusual shape, gently press the sides with an offset spatula to encourage them back into a neat round shape. This is totally optional!
  4. Top with chocolate chips. While the cookies are still warm, drop a few chocolate chips onto the tops to give them some extra chocolatey flavour.