Preheat oven to 350°. Brush sides and bottoms of 8 (3½-inch) jumbo muffin cups with melted butter; set aside.

Combine sugar and cinnamon in a small bowl. Cut thawed puff pastry sheets lengthwise in half. Roll each piece into a 24 x 8-inch rectangle. Brush with softened butter. Sprinkle with 3 tablespoon sugar mixture; set aside remaining sugar mixture.

Starting at one long side, roll each piece, jelly-roll style, into a log. Then cut each log lengthwise in half to make 8 pieces. Starting at one short side, roll each piece up, jelly-roll style, into a spiral; place each into a prepared muffin cup. Lightly brush with egg.

Bake 22 to 24 minutes or until edges are golden. Remove from muffin cups; roll in remaining sugar mixture.