Heavenly Hash Break-up

Preparation info

  • Makes one

    15½ × 10½ inch

    • Difficulty


Appears in

The Cookie Lover's Cookie Book

The Cookie Lover's Cookie Book

By Richard Sax

Published 1986

  • About

The old favorite chocolate-marshmallow-nut candy, baked in a huge, crisp cookie sheet, from which everyone breaks off his or her own pieces. Or try breaking the baked cookie sheet into smaller pieces, and folding them into vanilla or coffee ice cream. Mmmmm... .


  • 1 cup flour
  • 2 tablespoons unsweetened cocoa powder
  • ½ teaspoon baking soda
  • ¼ teaspoon salt
  • ½ cup (1 stick) unsalted butter, softened
  • ¾ cup sugar
  • 1 egg
  • ½ teaspoon pure vanilla extract
  • 1 cup semisweet chocolate morsels (6 ounces)
  • cups coarse-broken walnuts or pecans
  • 1 cup miniature marshmallows (or 8 to 10 quartered large marshmallows)


    1. Preheat the oven to 350°F. Line a 15½ × 10½-inch jelly roll pan with aluminum foil, pressing to coat the bottom and sides of the pan smoothly. Butter the foil; set aside.
    2. Sift the flour, cocoa, baking soda, and salt onto a sheet of wax paper; set aside. In an electric mixer, cream the butter and sugar at medium speed until light. Add the egg and vanilla, beating until well blended. Lower the mixer speed and mix in the flour mixture just until blended, no longer. Stir in the chocolate morsels and walnuts.
    3. With palms moistened in cold water, pat the dough into the bottom of the pan, so that it covers the pan evenly. You won’t be able to cover it completely; don’t worry about some holes in the batter.
    4. Bake 18 minutes, or until lightly puffed and the surface is dry (but still soft). Scatter the marshmallows over the surface, very gently pressing them into the chocolate mixture (careful—it’s still very hot!). Bake 2 minutes longer. Remove the pan from the oven and cool on a wire rack.
    5. When the mixture has cooled completely, invert the pan onto a baking sheet and carefully peel off the foil. Let everyone break off his or her own pieces of the hash.