Spread one side of each tortilla with just enough softened butter to cover lightly. Place tortillas on clean work surface, buttered sides down.
Spread 1 Tbsp each peanut butter and marshmallow creme on half of each tortilla.
Arrange 1/4 of the banana slices and 2 Tbsp chocolate chips over marshmallow creme; fold each tortilla over to cover filling.
Heat large non-stick skillet over medium heat 1 minute. Add two quesadillas; cook 1 to 2 minutes or until tortillas are golden brown and crisp, turning once.
Repeat with remaining quesadillas. Cut each into 3 pieces and serve immediately.
Servings: 4 servings.