Super Easy Sourdough Cinnamon Rolls

Ingredients

• 1 cup active sourdough starter
• 1/2 cup warm milk
• 1/4 cup granulated sugar
• 1/3 cup butter, melted
• 1 egg
• 3 1/2 cups all-purpose flour
• 1/2 tsp salt
• 1 tsp baking powder
• 1/2 tsp baking soda
• 1/2 cup brown sugar
• 2 tsp cinnamon
• 1/4 cup unsalted butter, softened
• 2 cups powdered sugar (confectioners' sugar)
• 1/4 tsp salt
• 2 tsp butter, melted
• 1 tsp vanilla extract
• 2-3 tbls milk or heavy cream