Raspberry-Pistachio Babka

Combine one tablespoon of sugar, yeast, and warm milk in the bowl of a stand mixer, then let it sit for 5 minutes until foamy. Add the remaining sugar, egg and egg yolk, flour, and salt.

Using the dough hook, mix at medium speed until the dough comes together into a ball. Reduce the speed and add the softened butter, one tablespoon at a time, waiting until each piece is fully incorporated.

Knead at medium-high speed until the dough is smooth. Form it into a ball, place it in an oiled bowl, cover, and let it rest in a warm place for about 30 minutes.