01 - Combine warm milk, 1 tablespoon sugar, and yeast in a small bowl. Let stand 5–10 minutes until foamy.
02 - Whisk together flour, remaining sugar, and salt in a large bowl.
03 - Add yeast mixture, melted butter, eggs, and vanilla (plus lemon zest if using) to dry ingredients. Mix until a soft dough forms.
04 - Knead on a floured surface for 8–10 minutes until smooth and elastic.
05 - Place dough in a greased bowl, cover, and let rise in a warm place for 1 hour until doubled in size.
06 - Punch down dough and divide into 6 equal pieces. Roll each into a rope about 16 inches long.
07 - For each loaf, braid 3 ropes together, pinching ends to seal. Form into a ring or leave as a braid, and place on parchment-lined baking sheets.
08 - Tuck 3 colored eggs gently into the braid of each loaf. Cover and let rise 30 minutes.
09 - Preheat oven to 350°F. Brush loaves with beaten egg and sprinkle with colored sprinkles if desired.
10 - Bake for 25–28 minutes until golden brown. Cool on a rack before serving.