Melt butter in small saucepan, remove from heat. Mix cornstarch and sugar together and add to butter. It will be sandy. Add the water, pouring slowly while whisking. Return to heat and simmer, stirring often, until thick and bubbly. Remove from heat and add the alcohol or extract. Add raisins if using.
This will thicken as it cools; serve slightly warm.
Nutrition: Based on 2 tablespoon serving: Calories 135; Total Fat 3 g 4 %; Saturated Fat 2 g 9 %; Monounsaturated Fat 1 g; Polyunsaturated Fat 0 g; Trans Fat 0 g; Cholesterol 8 mg 3 %; Sodium 22 mg 1 %; Potassium 1 mg 0 %; Total Carbohydrate 26 g 9 %; Dietary Fiber 0 g 0 %; Sugars 25 g; Protein 0 g 0 %; Vitamin A 2 %; Vitamin C 0 %; Calcium 0 %; Iron 0 %