For me, 1 cup starter is equal to 1 envelope (2 1/2 tsp.) yeast. This works very well. I've made cinnamon rolls, breads etc. Just thought I would pass this on. It's a very simple way of figuring how much starter to use for any yeast recipe. If the recipe calls for 2 envelopes yeast, use 1 cup sourdough starter and 1 envelope yeast. Try it.

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