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Midnight Brownies with (or Without) a Peanut Butter Pocket

These brownies are named for their dark, fudge-like appearance and texture. Ironically, they look much sweeter than they taste. The addition of light corn syrup in the batter creates a wonderful shine on the top of the baked brownies and, although most brownies have a tendency to crack or sink in the center, these have never done either. As for the peanut butter filling–it elevates the entire brownie eating experience to new heights! But be forewarned; These brownies disappear immediately in my house. When younger, I practically had to frisk my son in the morning. Once I found wrapped brownies in each pocket of his pants–on the sides, in the back and down the legs! For best flavor, if your instant coffee is granular (not powdered), pulverize it to a fine powder using an electric spice grinder; or put the granules in a plastic bag and crush them with a rolling pin or a wine bottle. Also, if you’re using the peanut butter filling, use the optional chocolate chips in the batter instead of walnuts or peanut butter chips.

Special Equipment

  • 9×13-inch baking pan (2 inches deep)
  • Sifter or a triple-mesh wire sieve

For the Peanut Butter Filling (Optional)

  • 1 cup creamy or chunky peanut butter
  • 1 cup confectioner’s sugar, plus more for dusting

For the Brownies

  • 2 sticks (1/2 pound) unsalted butter, plus more for baking dish
  • 6 ounces unsweetened baking chocolate
  • 1 teaspoon instant coffee granules, pulverized, or espresso powder
  • 2 teaspoons pure vanilla extract
  • 1 cup unbleached all-purpose flour
  • 3 tablespoons unsifted cake flour
  • 1 teaspoon double-acting baking powder
  • 1/2 teaspoon salt
  • 1 1/2 cups granulated white sugar
  • 3 generous tablespoons light corn syrup
  • 3 extra-large eggs, at room temperature
  • 1 extra-large egg yolk, at room temperature
  • Optional Additions: 1 cup semisweet chocolate chips or 1 cup chopped walnuts or 1/2 cup peanut butter chips mixed with 1/2 cup semisweet chocolate chips

1) To prepare peanut butter filling, if using: In a large bowl, thoroughly combine peanut butter with confectioner’s sugar. Knead briefly with your hands until smooth. Lightly dust a 14-inch sheet of waxed paper with confectioner’s sugar and place peanut butter mixture on the center of the paper. Lightly sprinkle the top of the filling with more confectioner’s sugar and place another sheet of waxed paper on top. Press filling to flatten gently and, using a rolling pin, roll out filling 1/4 inch thick into a 9×13-inch rectangle. Refrigerate until needed.

2) To set up: If using a glass baking dish, preheat the oven to 325o F; If using a metal pan, preheat to 350o F. Line baking dish with aluminum foil (dull side down for glass, dull side up for metal), allowing a 2-inch overhang at each end. Brush foil with melted butter and set aside.

3) To assemble brownie batter: In a 2-quart heavy-bottomed saucepan, melt the 2 sticks butter with chocolate over low heat. Remove from heat and stir in instant coffee and vanilla; let cool slightly. In a medium-sized mixing bowl, whisk together both flours, baking powder and salt. Sift this mixture into another bowl. Whisk sugar and corn syrup into the melted chocolate mixture until smooth. Add eggs (1 at a time) and egg yolk, whisking well after each addition. Add dry ingredients to pan with chocolate mixture and, using the whisk, gently but thoroughly combine until smooth. If desired, fold in walnuts or chips, using a rubber spatula.

4) To assemble brownies: If using peanut butter filling, pour 1/2 the brownie batter into the prepared baking dish and gently spread to each corner, using a rubber spatula. Peel off 1 sheet of waxed paper from filling and invert so filling sits directly on top of batter. Peel off the remaining piece of waxed paper and pour on remaining batter, spreading to enclose filling. If not using the filling, simply pour all of the batter into the prepared pan.

5) To bake and cool: Bake in preheated oven until a toothpick comes out almost clean when inserted in the center, 23 minutes (avoid overbaking). Place on a wire rack to cool thoroughly. Once cool, cover pan with aluminum foil and let sit at least 4 hours–preferably overnight. Then lift the brownie “cake” out of the pan (using the overhang of foil as a handle) and slice into 2-inch squares using a sharp knife. For easier slicing, wipe off any accumulated chocolate that clings to the knife after each cut.

6) To store: To best preserve moistness, store sliced brownies in an airtight tin separated by sheets of waxed paper or wrap each brownie in pliable plastic wrap. Either way, store at room temperature.

Timing is Everything:

• The peanut butter filling can be made 3 days ahead and kept in the refrigerator until needed. However, if the filling is very chilled, remove it from the refrigerator an hour before using so it won’t affect the overall baking time of the brownie mixture.

• As a time saver when assembling, sift the dry ingredients days ahead and leave in a covered bowl at room temperature. Give the mixture a good swish with the whisk before incorporating it into your batter.


Comments (3)


  1. […] and even grind her own peanut butter to make up for a deficit of store-bought needed for a batch of Lauren Groveman’s recipe for Midnight Brownies with Peanut Butter Pockets. And it is why Steve, despite currently suffering from a rather unpleasant virus, summoned the […]

    Pingback by Literally grinding out a peanut butter brownie post. | Gourmandistan — July 14, 2012 @ 8:33 pm

  2. Hi Lauren,
    I’ve tried a couple recipes and absolutely love the moisture in your cookies/brownies. Tried the midnight brownies (no PB filling) a few mins ago and had to bake them for 50mins instead of 23mins. Am going to get a oven thermometer this week to check my oven is working, but was wondering if these were meant to cook longer?

    Comment by Mandy — September 23, 2012 @ 11:48 pm

  3. Hi Mandy–sorry, i’m just seeing this (We just moved so it’s been hectic). For me 23 minutes are perfect–and I’ve made them many times. But ovens can get tempermental–and can get slow, all of a sudden. Are you using a double oven or a single, a convection or conventional?

    Comment by Lauren — October 23, 2012 @ 9:15 pm

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