In a bowl, combine raspberries, blackberries, strawberries, 1/4 cup sugar, lemon zest, and lemon juice. Stir until the sugar is mixed with berries and juices begin to form. Cover the bowl and refrigerate for about 1 hour.
In a cold bowl, mix heavy cream, crème fraîche, 1 tablespoon sugar, and vanilla extract. Whisk until soft peaks and sharp lines appear, which may take 5 to 8 minutes.
For assembly, place some cookie crumbs at the bottom of each serving dish. Top with a spoonful of macerated berries followed by a layer of whipped cream. Repeat layers until dishes are filled, ending with a sprinkle of cookie crumbs.
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