In a large bowl, combine flour, sugar, and salt. Add yeast. In a separate bowl, combine warm milk, melted butter, and vanilla. Pour wet ingredients into dry ingredients.
Knead the dough for 5-7 minutes until smooth. Let rise in a warm place for 1 hour.
Preheat oven to 350°F (175°C). Roll out dough and spread with winterberry jam, sprinkle with brown sugar and cinnamon, and dot with butter.
Roll up the dough tightly and cut into 1-inch slices. Place in a greased baking dish.
Bake for 30-35 minutes. While baking, whisk together powdered sugar, milk, and vanilla for the glaze. Drizzle over warm rolls.
Notes
Enjoy these warm and gooey rolls with a cup of coffee!