Round sweet bread sandwiches filled with jam or cream are a playful Mexican bakery treat. This family-friendly pan dulce is a soft, sweet, fun confection for kids and adults.
Warm the milk until just lukewarm (about 110°F), then dissolve the yeast and a pinch of sugar, letting it bloom for 10 minutes.
In a mixing bowl, combine flour, granulated sugar, and salt. Stir in the yeast mixture, eggs, vanilla extract, and melted butter.
Knead the dough on a floured surface for 8-10 minutes until smooth and elastic. Place in an oiled bowl, cover, and let rise in a warm spot for 1-1.5 hours.
Punch down the risen dough, then roll it out to 1/2-inch thickness. Cut out 16 rounds (about 2.5 inches each). Place on baking sheets and let rise 30-40 minutes.
Bake in a preheated 350°F oven for 15-18 minutes until pale golden. Cool on a rack, then sandwich pairs of rounds with jam and dust tops with powdered sugar.