Kahlua Cream Sauce

Bahan-bahan (12 porsi)

• 3 tablespoons butter
• 2 cups heavy whipping cream
• 3/4 cup sugar
• 1 tablespoon all-purpose flour
• 1 egg
• 1/4 teaspoon nutmeg
• 1/16 teaspoon kosher salt
• 1 tablespoon Kahlua liqueur
• 1 teaspoon vanilla extract