Dissolve yeast in warm milk for 5 minutes.
Mix flour, sugar, and salt in large bowl.
Add yeast mixture, melted butter, and egg.
Knead dough until smooth and elastic.
Place in greased bowl, cover, rise 1 hour.
Combine all chai spice filling ingredients thoroughly.
Roll dough into 12x18 inch rectangle.
Spread softened butter evenly across dough surface.
Sprinkle chai spice mixture over buttered dough.
Roll tightly from long side, seal edges.
Cut into 12 equal pieces carefully.
Place rolls in greased baking pan.
Cover and rise for 30 minutes.
Bake at 375°F for 20-25 minutes.
Cool slightly before adding glaze.