September 2026
Recipe from Cook's Illustrated, January 2026
Whenever I spot a new dessert recipe, my interest is instantly piqued—and this one hit all the right notes. We love raspberries, we love mousse, and best of all, this recipe relies entirely on pantry and freezer staples rather than fresh fruit. There’s nothing wrong with fresh berries, of course, but skipping them makes this treat significantly more budget-friendly and easy to whip up year-round. Naturally, it was worth a test run.
The Process
The Raspberry Base: I started by blooming unflavored gelatin in water. Next, I ground online-bought freeze-dried raspberries in a food processor and sieved out the seeds. For the core flavor, I cooked frozen raspberries with sugar and a pinch of salt until broken down, then strained the mixture to remove the seeds. I simmered this purée with a bit of the raspberry powder, pulled it from the heat, and whisked in lemon juice alongside the gelatin until smooth before letting it cool.
The Aeration: After whipping heavy cream to stiff peaks and stashing it in the fridge, it was time for the Swiss meringue. I gently whisked egg whites and sugar over a pan of simmering water. The recipe called for a temperature between 160°F and 165°F, but mine accidentally climbed to 175°F—though it didn't seem to cause any harm! I whipped the meringue to stiff peaks, gently whisked it into the cooled fruit purée, and then folded in the chilled whipped cream.
I divided the mousse into six ramekins, let them chill, and finished them with a light dusting of the remaining raspberry powder before serving. Total active time was about 1 hour and 15 minutes, plus 30 minutes of hands-off time (excluding cooling).
The Verdict
We loved it. The mousse delivered a strikingly bright, fresh-fruit flavor that will be a welcome treat during the winter months. Even better, it held up remarkably well in the fridge over several days without slumping or separating; the last ramekin was just as pillowy and delicious as the first.