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Vegan Monster Cookie Bars ~ Peanut butter and oatmeal cookie dough smothered in chocolate and studded with colorful candies is an easy, no-bake dessert treat that is frightfully delicious!

Monster Cookie Bars

Kids and adults alike love this easy, no-bake dessert treat that is frightfully delicious!
5 from 7 votes
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Course: Dessert
Cuisine: American
Keyword: cookies, dessert, Halloween, make-ahead, vegan, vegetarian
Prep Time: 15 minutes
Refrigeration Time: 2 hours
Total Time: 2 hours 15 minutes
Servings: 12
Calories: 375kcal
Author: Holly Gray


  • 6 tablespoons vegan butter softened
  • 6 tablespoons granulated sugar
  • 1/4 cup brown sugar packed
  • 3/4 cup creamy peanut butter
  • 6 tablespoons all-purpose flour
  • 1 teaspoon vanilla extract
  • 1/2 teaspoon salt
  • 1 1/2 cups quick cooking oats
  • 3/4 cup vegan m&m-style candies divided
  • 1 cup vegan semi-sweet chocolate chips
  • 3 tablespoons vegan heavy cream


  • Line an 8x8-inch baking dish with parchment paper. Set aside.
  • Into a large mixing bowl, add the butter, granulated sugar, and brown sugar. Use a hand mixer on medium speed to cream together the butter and sugars together.
  • Add the peanut butter and continue mixing until fully incorporated and consistency is smooth.
  • Add the all-purpose flour, vanilla extract, salt, and oats. Mix just until combined.
  • Stir in 1/2 cup of chocolate candies.
  • Press the cookie dough mixture into the prepared baking dish. Set aside.
  • In a microwave-safe bowl, combine the chocolate chips and heavy cream. Use the microwave to heat the chocolate in 20-second intervals, stirring after each interval until the chocolate is melted and its consistency is smooth.
  • Pour the melted chocolate over the top of the cookie dough mixture, using a spatula to spread the chocolate so that it covers the entire surface.
  • Sprinkle with the remaining 1/4 cup of chocolate candies.
  • Cover and refrigerate until set, at least 2 hours, then cut into squares and serve.


Calories: 375kcal | Carbohydrates: 37g | Protein: 7g | Fat: 23g | Saturated Fat: 9g | Polyunsaturated Fat: 4g | Monounsaturated Fat: 8g | Trans Fat: 1g | Cholesterol: 8mg | Sodium: 244mg | Potassium: 223mg | Fiber: 3g | Sugar: 26g | Vitamin A: 485IU | Vitamin C: 1mg | Calcium: 62mg | Iron: 3mg
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