In a bowl or 4-cup measuring cup, combine milk, hot water, melted butter, and sugar. Add in yeast, whisk it in and let it proof for 10 minutes. Pour mixture into the bowl of a stand mixer. (If you have a dairy mixer bowl, you can just put it all straight in there. We just don’t want to use hot water and dairy in a pareve mixer bowl.)
Add in 6 cups all-purpose flour, salt and eggs. Turn the machine to low, until the dough starts to come together. Increase the mixer to medium for about 6-8 minutes. If the dough is too sticky, gradually add the last half cup of flour. The dough should be slightly sticky.
Cover the mixer bowl and let the dough rise for 1 hour at room temp. until doubled in size.
Once risen, add 1 cup mini chocolate chips and knead until combined. (You can do this by hand, too.)
Divide the dough into 18-24 parts and shape them each into smooth round balls. Place the rolls onto two baking sheets lined with parchment paper.
Cover loosely and let the rolls rise for 15 minutes. Then brush with egg wash and sprinkle the remaining ¼ cup of chocolate chips on top of the rolls.
Bake at 350℉ for 20-22 minutes or until the tops are golden brown.