Ingredients
Method
- Preheat oven to 350 degrees Fahrenheit. Lightly grease or line an 11×7-inch baking dish with parchment paper that overhangs 2-inches on both sides. (Do not overdo it on the cooking spray; just a very light coating.)
- CRUST: Combine the flour, powdered sugar, salt, and butter in a food processor or stand mixer. Pulse/mix until mixture resembles fine crumbs that start to clump together. Press onto the bottom of the prepared baking dish. Bake at 350˚F for 18-20 minutes, or until golden brown.
- FILLING: Prepare filling when crust is just about done. Whisk together the sugar and flour in a bowl. Add the eggs, one at a time, whisking well after each addition. Add the zest, juice, and 3 drops or so of food coloring (if desired). Whisk together.
- Pour filling over HOT crust and bake an additional 20 minutes or until filling no longer jiggles, and edges brown.
- Let cool completely in the pan, about 1 hour. Then refrigerate for at least 1-2 hours until cold. Lift bars out of pan with parchment paper for easy cutting and serving. Store leftovers in the refrigerator.
Nutrition
Notes
Grapefruits are a very mild citrus fruit compared to tangy lemons or limes. Consider using 3/4 cup of grapefruit juice and 1/4 cup lemon juice to help boost the flavor and/or use more zest (up to 1 Tbsp more).
FYI: Pink or White Grapefruit is more tart than Ruby Red Grapefruit
This can be made in a 9×9-inch square baking dish, but would be best made with less filling. The crust measurements can remain the same.
To reduce the filling for a 9×9-inch pan, I would do: 1 cup granulated sugar, 3 Tbsp all-purpose flour, 3 large eggs, 2 tsp grapefruit zest, and 2/3 cup grapefruit juice.
This recipe can be made in a 13×9-inch pan, but you may want to 1.5x the crust recipe, or the crust will be very thin.