Go Back
+ servings
M&M Cookie Bars cut into slices on a board.
Print Pin
5 from 9 votes

M&M Chocolate Chip Cookie Bars

These super indulgent M&M chocolate chip cookie bars are the ultimate sweet treat! Fudgy brown sugar cookie dough studded with M&M's and M&M chocolate chunks.
Course Dessert
Cuisine American, British
Keyword m&m cookie bars
Prep Time 10 minutes
Cook Time 30 minutes
Total Time 40 minutes
Servings 12
Calories 431kcal
Author Beth Sachs

Ingredients

  • 200 g Butter melted
  • 125 g Golden Caster Sugar or use white caster sugar
  • 125 g Light Brown Sugar
  • 2 Eggs
  • 2 teaspoon Vanilla Extract
  • 275 g Plain Flour
  • 150 g M&M Chocolate Bar cut into chunks (or use chocolate chips instead)
  • 150 g M&M's chocolate ones (or your preference)

Topping

  • 50 g M&M's we used crispy M&M's but any flavour is fine.

Instructions

  • Preheat the oven to 180°C (160 fan/ 350F/ Gas 4) and line a small brownie pan or 20cm square baking tin with baking paper.
  • Cream together the melted butter and sugars in a large mixing bowl until pale and fluffy.
  • Beat in the eggs and vanilla extract.
  • Stir in the flour until combined.
  • Fold in the chocolate chunks and M&M's and spoon the mixture into the prepared tin.
  • Bake for 30 minutes (check after 25 minutes as all ovens are different). Take the tin out of the oven and top with the 50g of M&M's (push them into the top very gently so it doesn't crack too much).
  • Leave to cool before cutting into bars.

Video

Notes

Top Tips:
  • Line your tin (you can use a small brownie tin or a 20cm square baking tin) with baking paper. Make sure you leave the baking paper overhanging the top so that when the cookie bars are cool, you can lift the whole thing out onto a board to cut.
  • Add the additional M&M's to the top of the cookie bars after baking to prevent the M&M's burning or the colours running through the cookie dough.
  • Speed up cooling time by placing the tin into the fridge (or even freezer!) for 30 minutes to an hour.
  • To cut clean neat slices, first make sure the cookie bars are completely cool. Next, lift the cookie bars out of the tin using the overhanging baking paper as handles. Place on a flat wooden board and use a long sharp knife to cut into bars. Clean off the knife carefully between each cut.
 
Variations:
  • Use different candy combinations. How about smarties or chopped up Mars bars. You could even add mini eggs for an Easter themed cookie bar.
  • Make them extra fudgy and rich and replace the caster sugar and light brown sugar with the same quantity of dark brown sugar.
  • Add peanut butter chips instead of the chocolate chunks.
  • Add a handful of unsalted nuts to the cookie bars for added crunch and texture.
 
Freezing: The cookie bars can be frozen for up to 3 months.
Nutrition: The nutritional information provided is approximate and is calculated using online tools. Information can vary depending on various factors, but we have endeavoured to be as accurate as possible.
 
Nutrition Facts
M&M Chocolate Chip Cookie Bars
Amount per Serving
Calories
431
% Daily Value*
Fat
 
18
g
28
%
Saturated Fat
 
7
g
44
%
Trans Fat
 
1
g
Cholesterol
 
30
mg
10
%
Sodium
 
28
mg
1
%
Potassium
 
151
mg
4
%
Carbohydrates
 
60
g
20
%
Fiber
 
2
g
8
%
Sugar
 
34
g
38
%
Protein
 
8
g
16
%
Vitamin A
 
90
IU
2
%
Vitamin C
 
1
mg
1
%
Calcium
 
65
mg
7
%
Iron
 
4
mg
22
%
* Percent Daily Values are based on a 2000 calorie diet.
Tried this recipe?Snap a pic and tag @effortlessf00d on Instagram or Twitter