Sir/Madam: The answer to this question depends on where did it originate, in case it was originated in the Indian Subcontinent answers will be different than if it is originated in the West. Sour cream has acidity akin to buttermilk at about 0.8% but unlike buttermilk, sour cream also imbues a batter with 40 grams of fat per cup. Then go ahead, use it as a substitute for buttermilk in baking. To make each of these substitutes for buttermilk, stir the ingredients together and let them sit for about 10 minutes so the milk can "sour." In a large bowl, place butter, sugar, egg yolks and vanilla. It is pretty similar to the method for using plain yogurt. Spray a 15-cup bundt pan with no-stick cooking spray and preheat oven to a moderate 325°-330°. Buttermilk also adds a pleasant tanginess to baked biscuits, and its relatively low levels of fat make it work in recipes that call for any kind of fat, from butter to shortening, and even cream. ~ Step 2. Adding a bit of lemon juice is a good call. I have used sour cream in baking instead of buttermilk with no problems. One cup of real or substitute buttermilk = 1 cup of whole, skim, or non-fat milk. Add 2 to 3 tablespoons of buttermilk per cup of heavy cream or half and half and let it sit at room temperature for 1 to 2 days. I buy powered buttermilk at the local health food market. Heavy cream will result in a thicker sour cream, so choose based on the texture you're looking for. Both buttermilk and sour milk are living ecosystems, because they get their character from healthy bacteria. In the case of buttermilk, dairies use a consistent, specialized set of microorganisms, much the same as for sour cream or yogurt. Or, if the lemon flavor (or vinegar flavor) is undesirable, cream of tartar added to milk will raise lactic acid as well. Sour milk is a good substitute for Buttermilk and easy to make with this recipe How to make sour milk – Buttermilk Substitute. I sub buttermilk for oil, oil & egg, sour cream and even milk when called for in a recipe and achieve wonderfully moist results. Set aside. Why? In a 1 cup measuring container, stir together the sour cream, buttermilk and vanilla extract, until smooth. Those give the buttermilk its acidity, as well as its pleasant, almost cheesy-tasting tang. (Yes, cream can be used as both a liquid and a fat. To make sour cream, you just need buttermilk and heavy cream or half and half. At first glance, you can see that in butter is much more calories than in sour cream 18%.. Another option is "clabbered milk," a blend of milk and lemon juice or vinegar. Sour cream can also be used as a buttermilk substitute. To substitute for 1 cup of sour cream, either mix 7/8 cup of buttermilk with 3 tablespoons of butter, or mix 3/4 cup of buttermilk with 1/3 cup of butter. Butter has 717 kcal per 100g and sour cream 18% 181 kcal per 100g so … However, I add slightly more milk since sour cream tends to be thicker than plain yogurt (unless you’re using Greek yogurt). Sometimes I add milk or water to the sour cream to make up the amount I need (for instance, if I need 1 cup buttermilk but only have 3/4 cup sour cream, I … In the reverse, you can usually substitute buttermilk for yogurt or sour milk on a one-to-one basis. What is Buttermilk. The actual ratio of buttermilk and butter in About.com's sour cream substitution recipe can vary depending on the consistency desired. Buttermilk, which is generally derived from low-fat or non-fat milk contains little fat at approximately 2.5 grams per cup but offers greater acidity at around 1% acid content. Today the Buttermilk you find in grocery stores is milk that has a … I use lowfat plain yogurt as a regular sub for sour cream and notice do negative diff in my baking. 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