5 from 4 votes
Blondie S'Mores Bars
Blondie S'Mores Bars
Prep Time
30 mins
Cook Time
30 mins
Total Time
1 hr
Blondie S'mores Bars - a merging of two all time favorite sweet treats, blondies and good old fashioned s'mores.
Course: Dessert
Cuisine: American
Servings: 16 squares
Calories: 245 kcal
Author: Chris Scheuer
For the blondies:
  • 6 tablespoons butter
  • ¾ cup light brown sugar
  • 1 large egg
  • 2 teaspoons vanilla extract
  • ¾ cup all purpose flour
  • ½ teaspoon baking powder
  • ¼ teaspoon kosher salt
For the topping:
  • 1 1/2 cups milk chocolate chips or 4-5 Hershey 1.55-ounce candy bars
  • 3 cups miniature marshmallows
  • 1-2 1.55- ounce bar Hershey milk chocolate candy bars I cut the bars into individual squares, then cut each one in irregular halves.
  1. Adjust oven rack to middle position; heat oven to 350° F. Spray an 8-inch pan with cooking spray or grease lightly with oil. Cut an 8 x14-inch wide strip of foil and line pan foil with the 2 long sides extending over the top of pan. (You will use this later to easily remove bars from pan.) Spray or rub with oil to coat foil.
  2. Heat butter in a medium large saucepan till just melted. Remove from heat and allow cool slightly for a few minutes. Whisk in sugar, mixing until well combined. Add egg and vanilla, stir to incorporate.
  3. Add flour, baking powder, and salt together to mixture in pot. Using a rubber spatula stir just until combined; do not overmix.
  4. Bake until top is shiny, cracked, and light golden brown, 18 to 22 minutes; do not overbake. Set aside to cool for 10 minutes. Set broiler to high with rack set 6-8inches from broiler.
  5. Top blondies with chocolate chips (or lay candy bars across top to cover), then sprinkle with marshmallows. Place under the broiler for approximately 30 seconds to one minute or until marshmallows start to brown. Watch very carefully as marshmallow will quickly go from golden brown to burned.
  6. Remove from oven and cool for 10 minutes then add Hershey bar pieces, randomly inserting them across top. I like to make it look like they’re “peeking” out from the marshmallows.
  7. Set aside to cool completely. When ready to serve, lightly oil a sharp knife and cut into 2-inch squares.
Recipe Notes

Blondie recipe adapted from Cook's Illustrated.

Nutrition Facts
Blondie S'Mores Bars
Amount Per Serving
Calories 245 Calories from Fat 90
% Daily Value*
Fat 10g15%
Saturated Fat 6g38%
Cholesterol 24mg8%
Sodium 100mg4%
Potassium 68mg2%
Carbohydrates 35g12%
Fiber 1g4%
Sugar 27g30%
Protein 2g4%
Vitamin A 185IU4%
Vitamin C 0.1mg0%
Calcium 41mg4%
Iron 1.2mg7%
* Percent Daily Values are based on a 2000 calorie diet.