Easy Buttermilk Dinner Rolls With Yeast

Add buttermilk and water to a small microwave safe bowl and whisk in 2 tablespoons of flour. Microwave for 45 seconds, whisking every 15 seconds until a paste forms. You should be able to whisk it, if it is too thick, add a little water. Place in the refrigerator to cool to room temperature.
In the bowl of a stand mixer with the dough hook attached, add the flour, sugar, salt and yeast and mix to combine.
In a separate bowl, whisk the milk, egg, melted butter and cooled paste together until well mixed. Add to the flour mixture and mix on low speed with the dough hook until the dough comes together and the dry ingredients are incorporated, about 2 minutes. Then turn to medium speed and mix until it is smooth, about 10 minutes.
Form into a ball and place in an oiled bowl and cover with plastic wrap. Let it rise in a warm place for an hour, until doubled in size.
Gently punch down the dough and press it into an 8 inch square. Cut the dough into 12 equal pieces and form them into smooth balls. Place on a baking sheet sprayed with cooking spray about 2 inches apart. Cover and let rise for about an hour until doubled in size.
Preheat oven to 350º.
In a small bowl whisk the egg yolk with cream and brush it over the rolls. Bake for 25-30 minutes until golden brown. Remove and immediately brush with melted butter.