Information for this recipe is approximate and derived by calculations based upon supplier information and available reference data. These values may change based on your final product, substitution and or addition of ingredients, or use of a particular cooking technique.
Heat grill to medium. Cut each hen down the backbone and spread flat on a cutting board. Rinse hens and pat dry. Combine remaining ingredients in a small saucepan. Bring to a boil, stirring occasionally. Cook 5 minutes, stirring occasionally. Remove from heat. Pour half of glaze mixture into a small bowl; reserve for drizzling on Cornish hens before serving.
Place hens directly over burners or coals on grill. Grill hens, covered, 20 minutes, turning once. Spoon or brush hens with remaining glaze. Turn and baste again. Grill, covered, 10 to 15 minutes longer. Brush with glaze; turn and baste again. Grill, covered, 10 to 15 minutes longer or until done (internal temp 180ºF).
Drizzle with reserved glaze mixture before serving.