1 cup warm water 1 packet (1 tablespoon) yeast1/3 cup neutral oil ((butter or lard would make the bread non-kosher)2 eggs 1 large egg yolk (reserve the white for the egg wash)1 teaspoon vanilla 1/3 cup sugar (white or brown) 4 cups of all-purpose flour 1 teaspoon Kosher salt
Egg wash: reserved egg white beaten with a splash of water
Instructions:Dissolve the yeast in warm water with a generous pinch of the sugar and stir to combine. Let stand until you see a thin foamy layer across the top, 5 to 10 minutes. If you do not see tiny bubbles forming on top of the water, your yeast has likely expired or your water was too warm, so you’ll have to start over. Pour oil into yeast liquid when you are sure it is active. In a separate bowl, cream together eggs, egg yolk, sugar, and vanilla.
In the bowl of your stand mixer, add dry ingredients (flour and salt) and whisk to combine. Add egg mixture and roughly mix before adding yeast mixture. Turn your mixer on low to begin blending without sending flour flying all over your kitchen. As the dough comes together, turn the mixer speed up to completely mix and knead.
Fit the mixer with the hook attachment and knead on low speed for 6 to 8 minutes. Alternatively, turn out the dough onto a floured work surface and knead by hand for about 10 minutes. If the dough seems very sticky, add flour a tablespoon at a time until it feels tacky, but no longer like bubblegum. The dough has finished kneading when it is soft, smooth, and holds a ball-shape.
Divide the dough and roll into ropes. Divide the dough into 3 or 6 equal pieces, depending on the type of braid you'd like to do. Roll each piece of dough into a long rope about 16 inches long. If the ropes shrink as you try to roll them, let them rest for 5 minutes to relax the gluten and then try again.
Braid the dough. Gather the ropes and squeeze them together at the very top. Long loaves of 3-stranded challah are commonly served weekly for Sabbath meals. For a 3-stranded loaf, braid the ropes together like braiding hair or yarn and squeeze the other ends together when complete. Line a baking sheet with parchment paper and place the braided dough on top and sprinkle with a little flour. Cover with a clean kitchen towel and let it rise in a warm place away from drafts until puffed and pillowy, about 1 hour. At this point, your loaf is fairly long and skinny.
Brush the challah with egg wash about 15 minutes before baking. Be sure to get in the cracks and down the sides of the loaf. Arrange a rack in the middle of the oven and preheat oven to 350°F. Bake the challah 25 to 30 minutes rotating the baking sheet halfway through, until the challah is deeply browned and registers 190°F in the very middle with an instant-read thermometer.
Cool the challah. Let the challah cool on a cooling rack until just barely warm. Slice and eat. Wrap leftover challah tightly in plastic wrap and store at room temperature for up to 5 days. Use leftovers to make sandwiches, French toast, or our favorite – bread pudding!