Mix the dough-To this add the eggs, salt, butter, and 8 cups of flour. Mix for 1 minute on medium speed with the dough hook. Check the texture. It should be just slightly tacky (sticky), but not too sticky. If needed, add a little more flour or milk to get it to the right hydration. You want it to pull away from the edges of the mixing bowl, but not be too dry. Mix it on medium speed for 6-8 minutes until the dough is smooth.
First rise- Cover and let it rise for 45 minutes or longer to double the dough. When the dough is ready, mix the frozen raspberries, sugar, and lemon zest in a bowl. Place in the freezer while you prepare the dough.
Shape- Roll it to a 18x24 inch rectangle. Brush it with the melted butter and sprinkle it with the sugar. Add the frozen berries over the top of this. Then roll the roll up tightly. It will be a long roll, pinch the ends to seal. Cut rolls into 1-inch pieces. Place them in a 9x13 pan greased pan.
Second rise- Cover and let them rise for 30 minutes. At the end of the rising time, preheat the oven to 350 degrees. Bake the rolls for 25-30 minutes. Once they are baked, remove them from the oven.Let them cool slightly (about 15 minutes) and prepare the icing.
Lemon Cream cheese icing- Mix the softened cream cheese, butter, powdered sugar, vanilla, lemon zest, and lemon juice in a bowl. Once it is creamy, spread it over the slightly cooled rolls. They are ready to serve and be enjoyed!