Activate the Yeast: In a medium bowl, combine warm milk and 1 teaspoon of the sugar. Sprinkle the yeast over the milk and let sit for 5–10 minutes, until frothy.
Prepare the Dough: In a large mixing bowl, stir together melted butter, remaining sugar, and eggs. Add the yeast mixture and stir to combine. Gradually mix in flour and salt until a soft, slightly sticky dough forms.
Knead the Dough: Turn dough out onto a lightly floured surface. Knead for 5–7 minutes until smooth and elastic.
First Rise: Place dough in a lightly greased bowl, cover with a clean kitchen towel, and let rise in a warm place for 1 to 1½ hours, or until doubled in size.
Shape the Rolls: On a lightly floured work surface, roll the dough into a rectangle (about 18x12 inches) using a lightly floured rolling pin. Spread the raspberry jam evenly across the dough, leaving a ½-inch border around the edges.
Slice the Rolls: Roll the dough tightly from the long edge into a log. Use unflavored dental floss or a very sharp knife to cut into 12 equal pieces.
Second Rise: Place rolls into a greased baking pan (9x13-inch), cover, and let rise for 30–45 minutes, or until puffy and doubled in size.
Bake: Preheat oven to 350°F (175°C). Bake rolls for 20–25 minutes, or until golden brown and set in the center.
Make the Frosting: In a mixing bowl, beat cream cheese, softened butter, powdered sugar, and vanilla extract until smooth and fluffy.
Frost & Serve: Let the rolls cool slightly, then spread generously with cream cheese frosting. Serve warm and enjoy every gooey, jammy bite.