Rosemary crackers: Add 15 ml (1 tablespoon) finely chopped fresh rosemary at the same time as the butter.
Garlic–paprika crackers: Add 30 ml (2 tablespoons) Hungarian paprika and 2 chopped garlic cloves at the same time as the butter.
Black olive and hot pepper crackers: Add 60 ml (1/4 cup) oil-packed black olives, drained, patted dry, pitted and finely chopped and 5 ml (1 teaspoon) hot pepper flakes after.