Step #1 Combine milk & saffron; let this stand 10 mins.
Step #2 Dissolve yeast & 1 tsp sugar in warm water In a large-ish bowl; let this stand 5 mins or until foamy.
Step #3 Stir in milk mixture.
Step #4 Lightly spoon flour into dry measuring c; level with a knife.
Step #5 Add 5 c flour, butter, raisins, & salt to milk mixture, 1/4 c sugar, stirring to form a soft dough.
Step #6 Turn dough out onto a floured surface.
Step #7 Knead until smooth & elastic (about 8 mins); add enough of remaining flour, 1 tbsp at a time, to prevent dough from sticking to hands (dough will feel sticky).
Step #8 Place dough In a large-ish bowl coated with cooking spray, turning to coat top.
Step #9 Cover up & let rise in a warm place (85°), free from drafts, 1 1/2 hrs or until doubled in size.
Step #10 (Gently press two fingers into dough.
Step #11 If indentation remains, dough has risen enough.