Refrigerator Bran Muffins

Details

Ingredients

• 4 cups bran flakes cereal
• 2 cups wheat bran cereal (such as Kellogg's® All-Bran®)
• 2 cups boiling water
• 2 ½ cups white sugar
• 1 ½ cups shortening
• 4 eggs
• 5 cups all-purpose flour
• 5 teaspoons baking soda
• 1 teaspoon salt
• 1 quart buttermilk