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–+ servings
An overhead view of Mars Bar cookies piled in a napkin lined tin.

Easy Chunky Stuffed Chocolate Mars Bar Cookies

5 from 9 votes
Indulge in the taste of Mars Bar Cookies! These bakery-grade treats offer a chewy texture and rich caramel flavour. Easy to make, perfect for parties or lunchboxes, and the dough can be frozen for later use. Enjoy the heavenly blend of Mars Bar pieces and sweet goodness in every bite.
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Course: cookies, Dessert
Cuisine: American, British
Prep Time: 20 minutes
Cook Time: 15 minutes
Freezing Time: 2 hours
Total Time: 2 hours 35 minutes
Servings: 10 Cookies
Calories: 398kcal
Author: Rebecca Foxley

Ingredients
 
 

  • 185 g Unsalted Butter, chilled
  • 130 g Caster Sugar
  • 130 g Light Brown Soft Sugar
  • 180 g Mars Bars
  • 420 g Plain Flour
  • 0.5 tsp Salt, optional
  • 0.5 tsp Bicarbonate of Soda, (baking soda)
  • 10 g Baking Powder
  • 2 Large Eggs
  • 1 tsp Vanilla Essence

Instructions

  • Cut the cold butter into small cubes and place them in a large bowl or stand mixer.
  • Add the sugars to the butter and mix until it resembles breadcrumbs.
  • Chop the Mars Bars into chunks and add them to the butter-sugar mixture.
  • In a separate bowl, combine the flour, salt, bicarbonate of soda, and baking powder.
  • Slowly add the dry ingredients to the butter-sugar mixture and mix until just combined.
  • In another bowl, whisk the eggs along with the vanilla essence.
  • Add the whisked eggs to the rest of the ingredients and mix briefly to bind everything together.
  • Take approximately 100g of cookie dough and roll it into a ball with your hands.
  • Place the cookie dough balls into an airtight freezer-proof container or onto a lined baking tray.
  • Freeze the balls of cookie dough for at least a couple of hours.
  • Preheat the oven to 180°C (350°F) and place a lined baking tray in the oven to heat up.
  • Remove the unbaked cookies from the freezer and quickly place them on the hot baking tray, leaving space between each one.
  • Immediately put the tray back in the oven and bake for 15 minutes.
  • Remove the tray from the oven and allow the cookies to cool slightly on the baking tray to firm up.
  • Transfer the cookies to a cooling rack to cool further before serving.

Recipe Notes

 
  • Chill Butter: Use chilled unsalted butter for a chewier texture and less spreading.
  • Cut Mars Bars: Before chopping into small chunks chill the Mars Bars for ease.
  • Avoid Overmixing: Mix dry ingredients until just combined to avoid tough cookies.
  • Space Cookies: Leave enough room for spreading on the baking tray.
  • Cool on Tray: Let cookies cool slightly on the tray before transferring to a rack.

Nutrition Estimate

Calories: 398kcal | Carbohydrates: 48g | Protein: 5g | Fat: 14g | Saturated Fat: 8g | Polyunsaturated Fat: 1g | Monounsaturated Fat: 4g | Trans Fat: 1g | Cholesterol: 60mg | Sodium: 132mg | Potassium: 67mg | Fiber: 1g | Sugar: 21g | Vitamin A: 425IU | Calcium: 71mg | Iron: 2mg