This is a rich buttery yeast bread (almost cake or dessert), full of cinnamon flavor. It’s not hard to make, just takes a little time, and so worth the wait!
1/2 cup whole milk (heat to 110°)
1½ tsp yeast
1/4 cup sugar
2 egg yolks (reserve egg whites, 1 for filling & 1 for top of loaf)
1 tsp vanilla
2 cups flour
1/2 tsp salt
4 Tbl butter, softened
1 cup brown sugar
1/4 cup flour
2 Tbl butter, melted and cooled
1 egg white
2 tsp cinnamon
1/8 tsp salt
In bowl of mixer with dough hook, pour heated milk. Sprinkle yeast over milk, sprinkle sugar over yeast, and let sit until yeast is activated and bubbly. Add egg yolks, egg, and vanilla; mix. Add flour and salt; mix about 3 minutes. Increase mixer speed to medium and softened butter in pieces, one piece at a time. Mix until butter is incorporated and dough smooth, about 5 minutes. Turn dough out into a greased bowl, cover, and let rise until at least doubled (probably about 2 hours).
Mix cinnamon filling ingredients and set aside. Turn risen dough out onto well floured surface. Using enough flour so dough doesn’t stick, roll out into a 12″x16″ rectangle. Gently spread cinnamon filling evenly over surface of dough. Roll up starting from short side and pinch seam. Using a sharp knife, carefully cut all the way down the center of your dough cylinder (use flour on knife to help keep from sticking). Turn both halves of dough so filling is facing up. Twist one half over the other starting in the middle to the end (keeping cut edges facing up) and twist other end from center to the end. Tuck ends under and loaf together to length of loaf pan. Liberally grease loaf pan and carefully lift loaf into pan. Cover and let rise about 1½ hours.
Preheat oven to 350°. Lightly beat the one reserved egg white until frothy. Gently brush over risen loaf and sprinkle with cinnamon sugar if desired. Bake about 45 minutes. Cool in pan on cooling rack about 20 minutes, remove from pan and cool completely for clean, neat slices.