Cold-Infused Roasted Chestnut Mont Blanc with Tart Meyer Lemon & Crisp Cocoa Meringue

Instructions

1. 1

   Set a fine-mesh sieve over a clean, chilled metal bowl. Pour the mixture of 480g heavy cream cold-infused with 220g roasted chestnuts through the sieve. Press gently on the solids with a silicone spatula to harvest all chestnut-infused cream, then discard the spent chestnuts. Cover the bowl and return the infused cream immediately to the refrigerator to keep it ice-cold.

   5 min

   Tip: Do not press hard enough to push chestnut meal through the mesh. We want only the dissolved roasty nut oils, not muddy starches.

2. 2

   Preheat your oven to 200°F (95°C) with the fan off. In a spotless stand mixer bowl wiped down with lemon juice, combine 70g egg whites and 0.5g cream of tartar. Whip on medium speed until frothy, then slowly stream in 70g granulated sugar one tablespoon at a time. Increase speed to medium-high and whip to stiff, glossy peaks (about 5 minutes). Gently fold in 70g powdered sugar with a flexible spatula until completely incorporated.

   10 min

   Tip: Wipe the bowl and whisk with lemon juice or white vinegar before starting. Any microscopic trace of oil prevents full protein expansion.

3. 3

   Line a baking sheet with parchment paper. Transfer the meringue to a pastry bag with a 1/2-inch round tip and pipe six 3-inch discs. Scatter 25g roasted cocoa nibs evenly over the surfaces. Bake at 200°F (95°C) for 60 minutes until brittle, dry, and releasing cleanly from the paper without browning. Turn off the oven, prop the door open with a wooden spoon, and let them cool inside.

   60 min

   Tip: Low and slow is non-negotiable. Meringue should stay chalk-white and snap crisply, not caramelize.

4. 4

   While the meringues bake, whisk 120g fresh Meyer lemon juice, 2g Meyer lemon zest, 40g granulated sugar, and 1.5g agar-agar powder together in a small saucepan. Bring to a rolling boil over medium heat, whisking constantly for 60 seconds to hydrate the agar network. Pour the liquid into a shallow container and chill in the refrigerator for 25 minutes until firmly set.

   10 min

   Tip: Agar needs a full, active boil for 60 seconds. If you pull it early, the gel will weep liquid later.

5. 5

   Cut the chilled, firm lemon gel into rough cubes. Place them into a tall blending beaker or mini processor and blend on high for 60 seconds until transformed into an ultra-smooth, glossy fluid gel. Transfer into a small squeeze bottle or piping bag.

   5 min

   Tip: High shear breaks down the agar matrix into microscopic beads, creating a sauce that holds crisp dots without sagging.

6. 6

   Retrieve the chilled chestnut cream from the refrigerator. Add 35g powdered sugar, 3g pure vanilla bean paste, and 1g fine sea salt. Whip on medium speed using a hand mixer or chilled whisk until structured, billowy peaks form (about 3 minutes). Stop the moment the whisk leaves clean, holding ridges.

   5 min

   Tip: Nut-infused cream can turn grainy in seconds if over-whipped. Watch the texture shift from loose waves to soft architecture, then step away.

7. 7

   Place one crisp cocoa meringue disc onto each dessert plate. Pipe or cleanly spoon a generous mound of the whipped cold-infused chestnut cream over each disc. Pipe sharp dots of Meyer lemon fluid gel over and around the cream. Finish each serving with a tiny pinch of 1g flaky sea salt directly on the gel, and serve immediately.

   10 min

   Tip: Assemble just before serving. Future you deserves pristine contrast between the brittle, snapping base and the velvety cream.