Why Add Ice to Bone Broth?
During the bone broth-making process, it’s common to encounter unpleasant odors, foam, and impurities. However, with a simple trick—adding ice at the right moment—you can significantly improve the quality of your broth. Here are four surprising benefits of adding ice to your bone broth:
1. Eliminate Unpleasant Odors
Prolonged cooking can cause bones to release impurities that result in a distinctive, unpleasant odor. Adding ice helps to rapidly lower the temperature, slowing down the release of odors. This makes it easier to skim off the foam and remove impurities, resulting in a more fragrant and refreshing broth.
2. Clarify and Enhance the Appearance
Clarity is crucial when it comes to evaluating a well-made bone broth. When ice is introduced, impurities and foam solidify and rise to the surface, making them easier to remove. The result is a clearer, more appealing, and attractive broth.
3. Enhance Natural Sweetness
The sudden change in temperature stimulates the release of nutrients from the bones, particularly collagen and minerals. This intensifies the sweetness and natural flavor of the broth without the need for excessive seasoning. This secret technique adds depth to dishes like pho, bun bo, and soup.
4. Preserve Nutrients
Bone broth is rich in calcium, phosphorus, and essential amino acids. However, prolonged high temperatures can lead to nutrient loss. Ice helps regulate the temperature of the broth, maximizing its nutritional value.

Tips for Perfect Bone Broth
In addition to the ice trick, consider the following tips to elevate your broth, making it both delicious and nutritious:
1. Choose the Right Bones for Your Purpose
Leg bones: Rich in collagen, these bones provide a strong, sweet flavor ideal for dishes like pho and hot pot.
Tail and rib bones: These bones contain more meat, adding a rich, savory flavor to soups and stews.
Chicken and fish bones: For a lighter, more delicate broth, chicken and fish bones are ideal for soups and light dishes.
2. Properly Prepare the Bones
Before cooking, soak the bones in a brine solution or diluted vinegar for 15–20 minutes to eliminate odors and remove excess blood. Then, blanch the bones in boiling water for 2–3 minutes and rinse them in cold water to remove impurities, ensuring a clear and fragrant broth.
3. Seasoning Techniques
The foundation of delicious bone broth lies in the harmonious combination of basic seasonings like salt, grilled shallots, and grilled ginger, which enhance the natural aroma. Depending on your dish, you can add cinnamon, star anise, and cardamom (for pho) or pepper and bay leaves (for European-style soups and stews).

4. Optimal Cooking Time for Nutrient Extraction
Pork and beef bones: Simmer for 2–4 hours to obtain the richest flavor and nutrients.
Chicken bones: Cook for 1–2 hours for the best results.
Fish bones: To maintain a light flavor and avoid any fishy taste, cook for only 30–60 minutes.
By following these tips—from using ice to selecting the right bones and seasonings—you’ll be able to create a clear, flavorful, and nutritious bone broth that delights both your taste buds and your body.
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