Stam a good challa recipe, sift one 5 pound bag of flour use most of it leave half an inch left inside, beat 4 eggs, 3/4 of a cup conola oil, sift 2 cups of sugar, 1 and half table spoon salt, 22 ounces warm water, mix all together in a big bowl, to make yeast put 3 table spoons of yeast into a bowl add 3 table spoons of sugar and pour in one cup of warm water, mix it and wait untill it bubbles a lot then pour it into the bowl with the ingredients if necessary add leftover flour,knead into dough and do hafrashas challa enjoy and have a good shabbos.