This grown-up treat embraces the bitterness in both grapefruit and Campari, balancing the flavor with a rich, buttery shortbread crust.

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Credit: Caitlin Bensel

Recipe Summary

5 hrs
40 mins
Serves 16 (serving size: 1 bar)


Ingredient Checklist


Instructions Checklist
  • To prepare the crust, preheat oven to 350°F. Pulse flour, powdered sugar, 2 tablespoons cornstarch, and 1/2 teaspoon salt in a food processor until combined. Top with butter pieces; pulse until mixture resembles coarse meal, 4 to 5 times. Drizzle evenly with oil; pulse just until moistened, about 2 times. (Mixture will be crumbly.) Transfer mixture to an 8-inch square glass baking dish coated with cooking spray. Pat into an even layer, being careful not to compact it. (Pressing too firmly will create a dense, tough crust.) Bake at 350°F until lightly browned all over, 25 to 30 minutes. Cool to room temperature.

  • To prepare topping, combine granulated sugar, grapefruit juice, 3 tablespoons cornstarch, and 1/4 teaspoon salt in a heavy saucepan. Bring to a boil over medium, stirring constantly. Cook, stirring often, until thickened, about 2 minutes.

  • Place egg yolks in a medium bowl. Gradually whisk in half of grapefruit mixture. Add egg mixture to remaining grapefruit mixture in pan. Bring to a boil over medium, whisking constantly. Remove from heat; whisk in Campari. Pour through a fine-mesh strainer into a bowl; discard solids.

  • Spread grapefruit mixture onto crust. Cover and chill until set, 3 to 4 hours. Cut into 16 squares.

Nutrition Facts

148 calories; fat 7g; saturated fat 3g; protein 1g; carbohydrates 21g; fiber 1g; sodium 92mg; sugars 12g; added sugar 11g.