Brush both sides of tortillas with butter. Combine sugar and cinnamon in a bowl; sprinkle evenly on both sides of tortillas. Cut each tortilla into 8 wedges. Place tortilla wedges on a large baking sheet. Bake at 400° for 8 minutes or until crisp.
Combine yogurt and syrup in a bowl. Spoon 1/2 cup yogurt mixture into each of 4 bowls; top each with 2 teaspoons pecans. Serve each with 4 crisps. Garnish with mint, if desired.