grapefruit posset recipe

The 3-Ingredient Dessert That Sets Itself (No Gelatin, No Eggs)

Name: Grapefruit Posset
Prep time: 10 min
Cook time: 15 min
Total time: 25 min
Yield: 4 servings
Ingredients: 2 ¼ cups heavy cream; ¾ cup sugar; 9 tablespoons fresh-squeezed grapefruit juice; 2 teaspoons grapefruit zest; 1 teaspoons sugar; cool whip or homemade whipped cream, (optional)

Grapefruit posset is the easiest elegant dessert you'll ever make — just cream, sugar, and fresh grapefruit juice. The acid does all the work, and the result is silky, tangy, and genuinely impressive.

Dowell CooksApril 2, 20266 min read Print this post

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Grapefruit posset served in individual dishes, topped with sugared zest and a cloud of whipped cream.

Three ingredients, 25 minutes of effort, and you've got the most sophisticated dessert on the table. Cooking really can be this simple.

Overhead view of Heavy Cream, Granulated Sugar, Grapefruit Juice, Grapefruit, Sugar and Whipped Cream arranged on a table — Everything you need: heavy cream, granulated sugar, fresh grapefruit juice, a whole grapefruit for zest, and optional whipped cream.

Three moves make or break this recipe.

Three moves stand between you and the best easy dessert of your life. Don't rush any of them.

Cream must be hot enough (full boil) for the acid to set it properly on contact. Chill time is non-negotiable — 4 hours minimum, overnight is better.

Bring cream and sugar to a full boil, stirring until sugar dissolves — then pull off heat immediately
Add grapefruit juice off the heat and stir once; don't agitate further or you risk a grainy set
Strain into serving vessels and chill uncovered until fully set, at least 4 hours

When ready to serve, zest one grapefruit (2 teaspoons) while preparing Grapefruit Posset — Zesting a fresh grapefruit over the set posset — the sugared zest topping adds a fragrant, slightly crunchy finish.

Mise en place

15 minutes, and you’re ready to cook.

Mise en place for this one is genuinely quick — most of your 'work' is measuring and zesting. Get everything ready before you turn on the stove.

Gather EquipmentGather a small saucepan, a whisk, a measuring cup, measuring spoons, a zester or microplane, a small bowl, a spoon for stirring, and serving dishes (typically 4–6 depending on portion size).
Measure Heavy Cream and Granulated SugarMeasure 2¼ cups heavy cream and ¾ cup granulated sugar. Place each in a separate small bowl or measuring container, ready for the saucepan.
1 min
Measure Grapefruit JuiceMeasure ½ cup fresh grapefruit juice into a small bowl or measuring cup. Set aside.
1 min
Prepare Grapefruit Zest and Sugar ToppingUsing a zester or microplane, zest one fresh grapefruit to yield 2 teaspoons of zest. Place the zest in a small bowl and mix with 1 teaspoon granulated sugar. Set aside.
2 min
Stage IngredientsArrange the measured heavy cream, granulated sugar, and grapefruit juice near the stove in order of use. Place the grapefruit zest-sugar mixture and serving dishes nearby for final assembly.

Active time~15 min · hands-on

What you’ll need

Tools for this recipe.

Nothing fancy required here — this is a one-saucepan dessert. A microplane makes the zesting much easier, but a box grater works in a pinch.

small saucepan
whisk
measuring cup
measuring spoons
microplane
small bowl
spoon

What’s in it

Contains: milk
Fits: Vegetarian, Pescatarian, Gluten-Free, Nut-Free, Halal, Kosher

Halal and kosher also depend on how the ingredients are sourced and certified.

Smart swaps

Substitutions that still taste like the recipe.

Need to swap something out? Here are the best alternatives for each ingredient — ranked by how well they'll work in this specific recipe.

heavy cream

mascarpone
Juicier; more delicate.
half-and-half
Juicier.
cream

grapefruit juice

orange juice
Brings fruity notes.
schisandra berries
Brings clove-like and smoky notes; drier.
cranberry juice
Brings clove-like and smoky notes; lacks the piney and citrusy notes.

grapefruit

lime↑ sour
More aromatic.
lemon↑ sour
More aromatic.
kumquat↑ sweet
Less acidic.

whipped cream

whole milk↓ fatty
coconut cream↑ fatty
Brings fruity notes.
whipped topping↓ fatty
Brings fruity notes.

What it costs

$2.14Total cost

$0.54Per serving (4)

Produce: $0.09
Dairy & Eggs: $1.49
Beverages: $0.44
Baking: $0.12

Some prices are estimates.

Common questions

How do I know when the posset is fully set?

Give the dish a gentle jiggle — it should move as one unit, like a firm panna cotta, with no liquid sloshing around the edges. The center might have a very slight wobble, but it should look matte on top, not shiny and liquid. If in doubt, give it another hour in the fridge.

Can I make this ahead of time?

Absolutely — this is actually a great make-ahead dessert. You can make it up to 2 days in advance and keep it covered in the fridge. Just add the sugared zest and whipped cream right before serving so they stay fresh and don't get soggy.

My posset didn't set — what went wrong?

Most likely the cream wasn't hot enough, or you didn't use quite enough grapefruit juice. The boil needs to be a real boil, not just a simmer. Also make sure you're using fresh-squeezed juice — bottled juice can have lower acidity, which affects the set. If it's been 4+ hours and it's still liquid, it unfortunately won't recover. Start fresh and make sure you hit that full boil.

Can I use a different citrus instead of grapefruit?

Yes! Lemon and lime both work beautifully — they're more sour, so the posset will have more of a pucker. Yuzu is incredible if you can find it. Orange juice is milder and less acidic, so the set may be slightly softer. Keep the juice quantity the same regardless of which citrus you use.

What serving dishes work best?

Small ramekins, dessert glasses, or even short wide glasses all work great. You want something that holds about half a cup of liquid. The posset won't be turned out of the dish — you serve it right in whatever you pour it into, so pick something pretty!

The recipe

Grapefruit Posset

Serves 425 minBritish

The Quarterly

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