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–+ servings
Black Widow Peanut Butter Bars.

Deliciously Spooky Black Widow Peanut Butter Bars for Halloween

These Black Widow Peanut Butter Bars are a festive treat perfect for Halloween, combining peanut butter and chocolate in a delicious dessert.
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Prep Time 20 minutes
Cook Time 22 minutes
Cooling Time 1 hour
Total Time 1 hour 42 minutes
Servings: 24 bars
Course: Dessert
Cuisine: American
Calories: 240
Ingredients Equipment Method Nutrition Notes

Ingredients
  

For the Cookie Base
  • 1.5 sticks Salted Butter Provides moisture and rich flavor
  • 2 cups Creamy Peanut Butter Adds flavor and moisture; almond or cashew can be used
  • 0.75 cups Light Brown Sugar Brings sweetness; dark brown can be used for deeper flavor
  • 0.25 cups Granulated Sugar Balances sweetness and enhances texture
  • 2 Large Eggs Use at room temperature
  • 1 tablespoon Vanilla Extract Opt for pure vanilla for best taste
  • 2 cups All-Purpose Flour Substitutes like almond flour can work for gluten-free
  • 1 teaspoon Baking Powder Helps the bars rise
  • 0.5 teaspoon Kosher Salt Enhances flavor
For the Frosting
  • 2-3 cups Powdered Sugar Adjust quantity to taste
  • 0.5 cups Cocoa Powder Provides rich chocolate flavor
  • 0.25 cups Warmed Milk Ensures smooth spreadable frosting
For Decoration
  • Marshmallows For spider web design
  • Whoppers For spider bodies
  • Candy Eyes Optional for decoration
  • Melted Chocolate For crafting spider legs
  • Small Plastic Spiders Optional decoration

Equipment

  • 9x13-inch Baking Dish
  • Microwave-Safe Bowl
  • Mixing Bowl
  • Spatula

Method
 

Step-by-Step Instructions
  1. Preheat your oven to 350°F (175°C) and line a 9x13 inch baking dish with parchment paper.
  2. Combine salted butter and creamy peanut butter in a microwave-safe bowl, microwave until smooth.
  3. Mix in light brown sugar and granulated sugar, then add eggs and vanilla extract, stirring until smooth.
  4. Sift in flour, baking powder, and salt, then fold gently until just combined.
  5. Pour the mixture into the prepared baking dish and bake for 18-22 minutes until edges are golden.
  6. Allow to cool slightly then dollop peanut butter over the top and spread evenly.
  7. In a mixing bowl, combine cocoa powder, powdered sugar, warmed milk and butter, beat until smooth.
  8. Spread frosting evenly over the cooled bars and allow to set at room temperature for 1 hour.
  9. Melt marshmallows and stretch them to create a spooky web design over the frosted bars.
  10. Use melted chocolate to create spider bodies on a tray, then form legs with chocolate and freeze until set.
  11. Place chocolate spiders on the bars, add candy eyes and optional plastic spiders, then slice to serve.

Nutrition

Serving: 1barCalories: 240kcalCarbohydrates: 30gProtein: 4gFat: 12gSaturated Fat: 5gPolyunsaturated Fat: 1gMonounsaturated Fat: 2gCholesterol: 30mgSodium: 150mgPotassium: 200mgFiber: 1gSugar: 18gVitamin A: 300IUCalcium: 30mgIron: 1mg

Notes

These bars can be stored at room temperature for up to 5 days, in the fridge for up to 1 week, or frozen for up to 3 months.

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