Bath bombs with coconut oil. Learn how to make DIY chocolate chip cookie dough bath bombs with coconut oil & buttermilk. Scented with a sweet cookie dough fragrance oil, these DIY bath bombs are made with richly hydrating buttermilk powder and coconut oil for a calorie free self care treat in your bathtub. Learn how to make bath bombs now with these easy homemade bath bomb recipe from Soap Deli News.