For today’s challah, especially if you’re doing seeded ropes beside a plain rope and you want that plain rope to go deep mahogany, treat the egg wash like a finish, not an afterthought. Here’s how I’d do it. Egg wash the whole loaf after shaping. A whole egg, well beaten, gives you a good base coat and helps the seeds stick. Let the challah proof uncovered or lightly covered so that first coat has a chance to set a little. Right before baking, brush it again. For the seeded ropes, use your regular egg wash. For the plain rope, use egg yolk only. That yolk-only second coat is what gives you the darker, richer color. Egg yolk brings fat, protein, and natural pigments to the surface. Those proteins and sugars brown fast in the oven, and the fat helps give you that glossy bakery-style shine. A whole egg wash gives good color. Egg yolk alone gives deeper color. Milk can soften the effect because it adds water, which can dilute the coating and create more steam at the surface before browning really gets going. The key is timing. First coat after shaping. Second coat right before the oven. Don’t flood it, just brush it evenly. And get the sides, not just the top, because that’s where challah usually goes pale. That’s the little trick: whole egg for the structure, yolk-only where you want the drama. Henry⭐🔥