Grandmom's Cinnamon Rolls Recipe

Ingredients

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