Sodium carbonate is a strong alkaline salt that is used in making ramen (noodles), among other foods.
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Sho Spaeth has worked in publishing and media for 16 years. Prior to joining Serious Eats, he worked at The New York Times for a decade. Sho has written for Time Magazine, The New York Times, The Baffler Magazine, Conde Nast Traveler, among other publications.
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Updated May 12, 2023
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Why It Works
- Placing baking soda in a hot oven will transform it from sodium bicarbonate into sodium carbonate, a stronger alkaline salt.
- By tracking the change in weight of the baking soda as it bakes, you will know when the transformation from sodium bicarbonate to sodium carbonate is complete.
Heating baking soda makes it transform from sodium bicarbonate into sodium carbonate, which is a stronger alkaline salt. Baked baking soda is useful for applications in which a strong alkaline salt is required, such as in making ramen noodles.
November 2018
Recipe Details
Baked Baking Soda (Sodium Carbonate) Recipe
Prep5 mins
Cook2 hrs
Active10 mins
Total2 hrs 5 mins
Serves408 servings
Ingredients
920g (about 32oz) baking soda
Directions
Preheat oven to 350°F (175°C).
Line a rimmed baking sheet with foil. Note the weight of the foil-lined baking sheet using a digital scale. Spread baking soda in an even layer and place baking sheet in oven.
Bake, stirring the baking soda every half hour, until the weight of the baking soda is reduced to 613g (~21 oz), which is 2/3 of the starting weight (weigh the baking sheet with the baking soda, then deduct the recorded weight of the lined baking sheet to determine the weight of the baking soda itself). The amount of time this can take can vary quite a bit, anywhere from 2 to 5 hours.
Remove from the oven and, when cool, store in an airtight container; be careful not to handle the baked baking soda with bare skin.
Notes
Do not let the baked baking soda come in contact with your skin, as it is a caustic substance. If you do make contact with the baked baking soda, flush the area thoroughly with water.
Make-Ahead and Storage
Sealed in an airtight container, the baked baking soda will keep indefinitely.
Read More
| Nutrition Facts (per serving) | |
|---|---|
| 0 | Calories |
| 0g | Fat |
| 0g | Carbs |
| 0g | Protein |
Show Full Nutrition Label
×
| Nutrition Facts | |
|---|---|
| Servings: 408 | |
| Amount per serving | |
| Calories | 0 |
| % Daily Value* | |
| Total Fat 0g | 0% |
| Saturated Fat 0g | 0% |
| Cholesterol 0mg | 0% |
| Sodium 617mg | 27% |
| Total Carbohydrate 0g | 0% |
| Dietary Fiber 0g | 0% |
| Total Sugars 0g | |
| Protein 0g | |
| Vitamin C 0mg | 0% |
| Calcium 0mg | 0% |
| Iron 0mg | 0% |
| Potassium 0mg | 0% |
| *The % Daily Value (DV) tells you how much a nutrient in a food serving contributes to a daily diet. 2,000 calories a day is used for general nutrition advice. | |
(Nutrition information is calculated using an ingredient database and should be considered an estimate.)
