Homemade Onion Soup Mix 3/4 cup dry minced onion 1/3 cup beef bouillon powder 4 teaspoons onion powder 1/4 teaspoon crushed celery seed 1/4 teaspoon granulated sugar Combine all ingredients, mixing well. Store in an tight fitting container. About 5 tablespoons of mix are equal to a 1-1/4 ounce package.