In a small, microwave-safe bowl, combine syrup and peanut butter. Microwave for 10 to 20 seconds, until syrup just begins to bubble. Remove from microwave (be very careful, syrup will be HOT), and stir until smooth.
Serve over ice cream, pancakes, or waffles and enjoy!
*If using real maple syrup, reduce syrup to 2 teaspoons. Sauce will not be completely smooth, but it will be delicious.