Soap Slime Recipe Ingredients: 1 cup of Soap Flakes 3 cups warm water food coloring (Optional) large mixing bowl large container or tray Electric Mixer Directions: Add Soap Flakes to Bowl. *If adding food coloring add to water. Pour water into Soap Flakes. Mix with mixer. *Note: This mixture expands as you mix-Use the extra tray or bowl to contain the mixture.