Chocolate-Peanut Butter Fondue

1 (3 pound) coffee can
Sticks or forks
2 tablespoons margarine
2 ounces unsweetened chocolate
2 cups granulated sugar
1/2 cup water
1/4 cup peanut butter
1/2 teaspoon vanilla extract

Melt all ingredients in the can over a lot heat source. Mix thoroughly while melting to prevent burning. Remove can from the fire. Using the sticks or forks, dip marshmallows, fruit chunks, etc.