Grandmom's Cinnamon Rolls Recipe

Ingredients

• 1 cup milk
• 1/4 cup white sugar
• 1/4 cup shortening
• 1 teaspoon salt
• 1 (.25 ounce) package yeast
• 1/4 cup warm water
• 3 1/2 cups all-purpose flour
• 1 large egg
• 1 cup white sugar
• 1/2 cup melted butter
• 3 tablespoons ground cinnamon
• 2 cups confectioners' sugar
• 2 tablespoons water, or more as needed