Chai Eggnog

2 cups eggnog
1 teaspoon vanilla
1/3 cup powdered chai tea
1/3 cup brandy
1 tablespoon brown sugar
2 gingersnaps, crushed

Using an electric mixer, beat the eggnog, vanilla, chai powder and brandy. On a small plate, stir together the brown sugar and 1½ teaspoons water. Place the crushed gingersnaps on another small plate. Coat the rims of four rocks glasses with the brown-sugar syrup, then the gingersnap crumbs. Fill the glasses with the chai eggnog.