How to Make Buttermilk Substitute (4 Ways)

Steps

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1. 1
   Method 1: Combine 1 cup whole milk with 1 tbsp lemon juice or vinegar, stir well, and let sit for 5 to 10 minutes until it curdles slightly.
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2. 2
   Method 2: Mix 1 cup milk with 2 tsp cream of tartar, stir, and let sit to create another buttermilk substitute.
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3. 3
   Method 3: Whisk together 1/2 cup sour cream and 1/2 cup water until smooth; this mixture is a bit chunkier, so use a whisk to combine.
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4. 4
   Method 4: Combine 3/4 cup plain yogurt (not Greek or skyr) with 1/4 cup water and mix until ready to use.
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5. 5
   If a recipe calls for room-temperature buttermilk, microwave the substitute for 30 seconds and let it stand for 10 minutes to help the acid react fully with the milk solids for that curdled texture.
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6. 6
   Once it develops a slightly curdled appearance, that means the acid has reacted properly and the substitute is ready to use as called for in your recipe; store any leftovers covered in the fridge and use within 24 hours.
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