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Cold-Set Blackberry & Lemon Slab with Olive Oil

Cold-Set Blackberry & Lemon Slab with Olive Oil

A pure distillation of summer. We are treating blackberries like a fine wine—clarifying their juice, fortifying it with lemon zest, and setting it just enough to hold a clean knife edge. Finished with grassy olive oil and toasted almonds, it is minimalism at its most rewarding.

Theo Glass
Theo Glass
Prep: 25 minutes
Cook: 5 minutes
6
easy
dessert
minimalistgelatinsummermake-ahead+1

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Timeline

4 hours 35 minutes
0m1h2h3h4h4h35
Prep Pan & Bloom
Blend & Strain
Heat & Infuse
Toast Almonds
Dissolve & Pour
Chill Slab
4h
Slice & Plate

Ingredients

  • 600 g Fresh blackberries(Rinsed and dried)
  • 60 g Filtered water(Cold, for blooming gelatin)
  • 10 g Powdered gelatin(Approximately one packet)
  • 80 g White sugar(Keeps the color vivid and clean)
  • 1 whole Lemon(Peeled into wide zest strips)
  • 15 g Lemon juice(Freshly squeezed)
  • 40 g Sliced almonds(For the two-texture rule)
  • 30 g Fruity extra-virgin olive oil(The greener and fruitier, the better)
  • 3 g Flaky sea salt(For finishing)

Instructions

  1. 1

    Wipe down your counter. Line a 9x5-inch loaf pan with plastic wrap, smoothing out the wrinkles—this dictates the final look of your dessert. In a small bowl, whisk 60g filtered water and 10g powdered gelatin. Set a timer for 5 minutes to let it bloom.

    5 min

    Tip: Sprinkle the gelatin evenly over the water to avoid dry clumps. Precision is freedom.

  2. 2

    Place 600g fresh blackberries in a blender and process on high until completely broken down. Pass the puree through a fine-mesh sieve into a bowl, pressing firmly with a silicone spatula. Discard the seeds. You should have a vibrant, smooth juice.

    10 min

    Tip: Take your time pushing the juice through. We want pure flavor, no grit.

  3. 3

    Pour the strained blackberry juice into a medium saucepan. Add 80g white sugar and the wide zest strips from 1 whole lemon. Bring gently to a bare simmer over medium heat. Once it simmers, immediately turn off the heat and let the zest steep.

    10 min

    Tip: Do not boil. Boiling clouds the juice and alters the fresh berry profile.

  4. 4

    While the blackberry mixture steeps, place 40g sliced almonds in a dry skillet over medium-low heat. Toast tossing frequently, until fragrant and golden brown. Transfer to a cool plate.

    5 min

    Tip: Nuts carry residual heat. Move them off the hot pan immediately to prevent bitterness.

  5. 5

    Remove and discard the lemon zest strips from the warm blackberry juice. Check your gelatin—it should be a firm puck. Whisk the bloomed gelatin into the hot liquid until completely dissolved. Stir in 15g lemon juice. Pour the mixture into your prepared pan.

    5 min

    Tip: Adding fresh lemon juice off the heat preserves its bright, acidic bite.

  6. 6

    Transfer the pan to the refrigerator. Let it chill completely undisturbed for at least 4 hours. Do not rush this. Future you deserves clean slices.

    240 min

    Tip: Ensure the pan sits on a perfectly level shelf in your fridge.

  7. 7

    Lift the set slab out of the pan using the plastic wrap overhang. Warm a sharp chef's knife under hot running water, wipe it entirely dry, and cut into 1-inch thick slices. Plate and finish with a drizzle of 30g fruity extra-virgin olive oil, a scatter of the toasted almonds, and a pinch of 3g flaky sea salt.

    5 min

    Tip: Wipe and re-warm the knife between every single cut. No exceptions.

Chef's Notes

Why this works: We are relying on a 1.6% gelatin ratio by weight, which yields a texture that melts cleanly on the palate rather than bouncing like rubber. The olive oil isn't just a garnish; it's a structural contrast. Its fat mellows the sharp acidity of the blackberry and lemon, while the salt amplifies the fruit's natural sweetness. We aren't adding steps, just improving decisions.

Frequently Asked Questions

How long does Cold-Set Blackberry & Lemon Slab with Olive Oil take to make?

Cold-Set Blackberry & Lemon Slab with Olive Oil takes about 30 minutes total. That includes 25 minutes of prep and 5 minutes of cooking.

How many servings does this recipe make?

This recipe makes 6 servings.

What skill level is needed for Cold-Set Blackberry & Lemon Slab with Olive Oil?

This recipe is rated easy — it's beginner-friendly and straightforward.

What ingredients do I need for Cold-Set Blackberry & Lemon Slab with Olive Oil?

The main ingredients are: Fresh blackberries, Filtered water, Powdered gelatin, White sugar, Lemon, Lemon juice, Sliced almonds, Fruity extra-virgin olive oil, Flaky sea salt.

What type of meal is Cold-Set Blackberry & Lemon Slab with Olive Oil?

Cold-Set Blackberry & Lemon Slab with Olive Oil is categorized as: dessert.