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Lynn’s Black Hills Brownies

My Sister-in-Laws sister, Lynn, brought these to a family gathering.  It took a lot of prodding to get the recipe out of her.  Do your first batch with double frosting the way Lynn always does.

Lynn’s Black Hills Brownies

Category: Bars, Cookies & Treats, Recipes

Lynn’s Black Hills Brownies

Here at Gurley’s, we love the chewey, crusty, soft-ish combo. The best is when they are just out of the oven with a bit of vanilla ice cream and maybe a smidge of hot fudge. Mmmmmmmmm… Yummy!


  • Base:
  • 6 (1-oz.) squares unsweetened chocolate
  • 1 cup butter
  • 8 large marshmallows
  • 1 tbsp. corn syrup
  • 3 cups sugar
  • 6 large eggs
  • 1 ½ tsp. salt
  • 2 tsp vanilla
  • 2 ¼ cups flour
  • ¼ cup Gurley’s Chopped Walnuts or Pecans
  • Frosting:
  • 1 1/3 cups sugar
  • 6 tbsp. butter
  • 6 tbsp. milk
  • 1 cup Gurley’s Semi-Sweet Chocolate Chips


  1. Preheat oven to 350°F.
  2. Grease and flour a 15” x 10” x 1” pan.
  3. In a large, heavy saucepan melt chocolate, butter, marshmallows and corn syrup. Remove from heat.
  4. Stir in sugar until well mixed.
  5. Beat in eggs, one at a time.
  6. Stir in salt and vanilla.
  7. Blend in flour then fold in nuts.
  8. Spread in prepared pan. Bake for 30-35 minutes.
  9. Frost when cool with:
  10. In a saucepan add 1 1/3 cups sugar, 6 tbsp. butter and 6 tbsp. milk and boil for 3 minutes stirring constantly. Remove from heat and add 1 cup Gurley’s Semi-Sweet Chocolate Chips. Stir until melted. Spread on cooled brownies.