Begin by warming the whole milk and 6 tablespoons of unsalted butter in a small saucepan over low heat until the butter melts. Remove from heat and let it cool slightly (to about 110°F).
In a large mixing bowl, combine the warm milk mixture with the instant yeast and sugar. Stir gently and let it sit for about 5 minutes until it becomes frothy.
Add the eggs and kosher salt to the yeast mixture and whisk until well combined.
In a separate bowl, whisk together the whole milk powder and White Lily bread flour. Gradually add this flour mixture to the wet ingredients, mixing until a dough forms.
Transfer the dough onto a floured surface and knead for about 5-7 minutes until it becomes smooth and elastic. Form it into a ball and place it in a greased bowl. Cover with plastic wrap and let it rise in a warm place for about 1 hour or until doubled in size.
In a small bowl, mix together the creamy peanut butter, 2 tablespoons of unsalted butter, light brown sugar, and cinnamon until smooth.
Once the dough has risen, punch it down and roll it out into a rectangular shape, about 1/4 inch thick.
Spread the peanut butter mixture evenly over the rolled-out dough, leaving a small border around the edges. Sprinkle the mini chocolate chips on top.
Starting from one long side, carefully roll the dough into a tight log. Cut the log into 12 equal pieces. Place the rolls in a greased 9x13-inch baking pan.
Cover the pan with plastic wrap and let the rolls rise for another 30-45 minutes until puffy.
While the rolls are rising, preheat your oven to 350°F (175°C).
Once the rolls have risen, brush the tops with the melted butter. Bake for 20-25 minutes, or until golden brown.
While the rolls are baking, prepare the chocolate ganache. In a microwave-safe bowl, combine the finely chopped chocolate, unsalted butter, heavy cream, corn syrup, vanilla extract, and a pinch of salt. Heat in the microwave in 30-second intervals, stirring until smooth and glossy.
Once the rolls are out of the oven, allow them to cool for a few minutes before drizzling the warm chocolate ganache over the top.
