Monster Sugar Cookie Bars

Hi Friends! I’m sorry I haven’t posted since early last week. We ended up going out of town to the mountains with family and I had zero internet access. I wanted to have recipes scheduled, but my husband and daughter were both sick too so I just fell behind.

I’m hoping these ridiculously adorable monster sugar cookie bars make up for my lack of posting because I mean, look at them! Gah!!!! We are so ready for Halloween in my house. The decorations are up and I’ve got all my fall candles going.

These little sugar cookie bars are everything a sugar cookie should be. They are thick and perfectly soft. Then I covered them with a nice thick layer of fluffy buttercream frosting! If you aren’t a big frosting person, you can certainly use less, but I’m loving the frosting to bar ratio in these.

Monster Sugar Cookie Bars

I did a lMonster Pudding Cupsight purple buttercream for my monsters, but you can really use any color you want. If you happen to have one of those grass frosting tips, I would recommend using it for these to make little monster hair! I just can’t get over how yummy and adorable these bars are for Halloween and best of all, they are so easy to make!

Monster Sugar Cookie Bars

Monster Sugar Cookie Bars
Yield: about 18 bars

Monster Sugar Cookie Bars

Prep Time 15 minutes
Cook Time 25 minutes
Total Time 40 minutes

These adorable sugar cookies bars are topped with a thick layer of buttercream frosting and googly eyes to create a fun and easy Halloween treat!


For the bars:

  • 1/2 cup unsalted butter, softened
  • 3/4 cup granulated sugar
  • 2 large eggs
  • 1 teaspoon vanilla extract
  • 1 1/2 cups all-purpose flour
  • 1 teaspoon baking powder
  • 1/2 teaspoon baking soda
  • 1/2 teaspoon salt
  • 1 teaspoon cornstarch

For the frosting:

  • 1/2 cup unsalted butter, softened
  • 2 cups powdered (confectioners’) sugar
  • 1 teaspoon vanilla extract
  • 2-3 tablespoons milk or half and half
  • food coloring
  • sprinkles, eye ball candies, etc.


  1. Preheat oven to 350°F. Line an 8×8 baking dish with parchment paper or foil and spray lightly with non-stick spray. Set aside.
  2. In a bowl, cream together the butter and sugar until fluffy, about 2 minutes. Beat in the eggs and vanilla extract until well-combined.
  3. In another mixing bowl, stir together the flour, baking powder, baking soda, salt, and the cornstarch until combined. Slowly add the dry ingredients in with the wet ingredients until just combined.
  4. Spread the dough into the baking dish, using oiled hands or a spatula to spread into an even layer. Bake the bars for 25 minutes or until lightly golden on top. Let the bars cool completely before frosting.
  5. To make the frosting, beat together the butter and powdered sugar until combined. Stir in the vanilla and milk (or half and half). Add in the food coloring. If frosting is too thick, add more milk. If it is too thin, add more powdered sugar. Spread the frosting onto the cooled sugar cookie bars. Decorate with sprinkles and eyeballs. Slice and serve.

Nutrition Information:



Serving Size:

1 bar

Amount Per Serving: Calories: 261Total Fat: 11gSaturated Fat: 7gTrans Fat: 0gUnsaturated Fat: 4gCholesterol: 48mgSodium: 133mgCarbohydrates: 39gFiber: 0gSugar: 31gProtein: 2g

Monster Sugar Cookie Bars

Looking for more Halloween treats! Give these a try!
Monster Pudding Cups
Monster Sloppy Joes
Pumpkin Butter Cups