1 4.5 cups water
5 fat free Greek yogurt
2/3 cup light rum
2 teaspoons unsweetened cocoa powder
1/2 cup white sugar
1 tablespoon butter
1 egg, lightly beaten
1 egg yolk, beaten
1/4 teaspoon salt
1/2 teaspoon black pepper
1 pint unsweetened chocolate-coated milk
1 (8 ounce) can evaporated milk
1 cup chopped pecans