Start the dome early: Give it plenty of time to freeze completely, or the layers will shift once placed on the brownie. Overnight is ideal.
Egg separation: Separate eggs when they are cold, then let them warm to room temperature. Cold yolks and whites separate more easily, but room temperature whites produce much more volume when whipped.
Clean assembly tip: Attach the brownie to the ice cream before unmolding. Place the cooled brownie upside down on top of the frozen ice cream dome, press firmly so it adheres, then flip the entire bowl over in one motion. This keeps your hands off the ice cream and helps everything release neatly.
Use a clean bowl: Any grease can keep egg whites from whipping properly.
Seal the meringue to the brownie well: Full coverage helps protect the ice cream during toasting.
Work quickly during assembly: Cold layers stay neat and easier to handle.
Add sugar slowly: One tablespoon at a time allows for a smooth, glossy meringue that spreads easily and toasts evenly.
Toast with focus: Meringue browns fast, so keep your eyes on it.
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