1cupwater(you might not need all, see instructions).
Instructions
In the bowl of your Kitchen Aid, combine warm water, yeast, and sugar. Let sit for 5 minutes to proof.
Mixing slowly, add the flour. You can either use a measuring cup, or just guesstimate half the bag. Add oil, sugar, and salt and continue to mix. Slowly add in the water. The amount of water you add now (whether it’s less than the full cup, or more) depends on whether you added a little more or a little less than half the bag… so add water slowly and watch your dough. Knead for a few minutes (it doesn’t take long) until nice and smooth. Remove to a greased bowl, cover.
Form and bake your challahs however you like.
You can now repeat the recipe again! A 5 or 6 quart KitchenAid does not fit a full bag of flour at once. Note that the second time you add the final remaining cup of water, you will need more or less than last time because the flour won’t be exactly half and half. One batch will have a bit more or less than the other. Add dough to same bowl and let rise.