For the Crust
1 1/4 cups (about 5 ounces) crushed graham crackers
1 1/4 cups (about 5 ounces) crushed gingerbread cookies
8 Tablespoons (4 ounces) unsalted butter, melted
1/4 cup packed brown sugar

For the Filling
1 package (.25 ounce) unsweetened powdered gelatin
2 1/2 Tablespoons rum
2 1/2 Tablespoons brandy
2 cups granulated sugar, divided
4 extra large egg yolks
1/2 cup heavy cream
1/2 cup whole milk
1 package (8 ounces) cream cheese
1 container (8 ounces) mascarpone cheese
1/4 teaspoon freshly grated nutmeg

Garnish
1 cup heavy cream
1 Tablespoon granulated sugar
Freshly grated nutmeg