Bread Baking Babes Challah (the siamese twins)

I found this great group of bread baking and I hope i'll manage to bake with them all of their breads ! This must be the braided period for me ! I' m braiding also Anita's hair (and her doll's as well !). This recipe was very easy and great tasting (it is the first of my breads that even finnicky Carlo enjoied !) Actually I'm going to prepare it again as soon as I finish tis post ! The recipe was chosen by Sarah of I like to cook and not having read well enough her instructions I made her mistake covering the loaves with cling film durung proofing but they were beautiful even so ! Thank you Sarah !

Challah
from The New York Times Bread and Soup Cookbook

Makes two loaves

5 1/2 to 6 1/2 cups flour, unsifted
3 TB sugar
1 1/2 tsp salt
1 package dry active yeast
1/2 cup butter or margarine, softened
pinch powdered saffron
1 cup warm water (120-130'F)
4 eggs, at room temperature
1 tsp cold water
1/2 tsp poppy seeds

Combine 1 1/4 cups of flour, the sugar, salt and yeast in a large bowl. Mix in the softened butter. Stir the saffron into the warm water until it dissolves. Add a little at a time to the flour mixture and blend thoroughly. Beat for 2 minutes with an electric mixer and medium speed, scraping the bowl occasionally. Separate the yolk and white of one egg. Blend the single egg white and the other 3 whole eggs into the batter. Reserve the single egg yolk. Stir 1/2 cup of flour into the batter and beat at high speed for 2 minutes, scraping the bowl occasionally. Blend in enough additional flour to make a soft dough. Knead the dough on a lightly floured board about 8 to 10 minutes or until it is smooth and elastic. Place the dough in a greased bowl, turning it once to grease the top. Cover and allow the dough to rise in a warm, draft free place until double in bulk (approximately one hour).

Flour a pastry board lightly and set the dough on it. Divide the dough into 2 equal portions. Divide each portion into 2 pieces, using 1/3 of the dough for one piece, and 2/3 of the dough for the other. Divide the large piece into 3 equal portions. Roll each of these into 12 inch ropes. Braid the ropes together tightly, using your fingers to press the dough together at the ends. Divide the smaller piece into 3 equal portions. Roll each of these into 10 inch ropes and braid tightly. Place the smaller braid on top of the larger one and seal the ends. Repeat this process to form the second loaf.

Place both braided loaves on a greased baking sheet. Mix the reserved single egg yolk with the 1 tsp of cold water and brush the top of the loaves with the mixture. Sprinkle with poppy seeds, and let the loaves rise until double in bulk in a warm draft free place (approximately one hour). Bake in a 400' over for 20 to 25 minutes. Remove from the oven and let cool on wire racks.