HEAT oven to 350ºF.
BEAT first 5 ingredients with mixer until blended; spoon into 24 paper-lined muffin cups.
BAKE 20 to 22 min. or until toothpick inserted in centers comes out clean. Cool in pans 10 min.; remove from pans. Cool completely.
BEAT cream cheese, butter and vanilla in large bowl with mixer until blended. Gradually beat in sugar. Blend in cinnamon. Spread over cupcakes.