In the bowl of a stand mixer, combine the sourdough starter, water, flour, baking soda, baking powder, salt, melted butter, maple syrup, and eggs. Mix on low speed for about 10 minutes, until the dough is smooth, elastic, and slightly translucent when stretched.
½ cup active sourdough starter, ½ cup water, 4 ½ cups all-purpose flour, 1 teaspoon baking soda, 1 teaspoon baking powder, ½ teaspoon salt, ½ cup melted butter, ½ cup maple syrup, 2 eggs
Place the dough in a greased bowl, cover it, and let it rest in a warm spot overnight.
Preheat your oven to 350°F (180°C). In a separate bowl, mix the softened butter, brown sugar, and cinnamon to make the filling.
½ cup butter, 1 cup brown sugar, 2 tablespoons cinnamon
Lightly flour your work surface and roll out the dough into a rectangle about ¼ inch thick. Spread the cinnamon sugar filling evenly over the surface. Roll the dough tightly into a log and cut it into 12 even slices.
Grease a 9x13 baking dish or line it with parchment paper. Place the rolls in the dish, leaving a little space between them. Bake for 20–25 minutes or until the tops are lightly browned. Let the rolls cool on a rack.
While the rolls cool, combine the cream cheese, heavy cream, confectioner’s sugar, and vanilla extract in a bowl. Mix until smooth, then spread the topping over the rolls.
6 ounces cream cheese, ½ cup heavy cream, 1 cup confectioner’s sugar, 2 teaspoons vanilla extract
Sprinkle a little cinnamon on top before serving. Serve and enjoy!