Chestnut orgeat syrup is a luxurious and nutty syrup made by blending roasted chestnuts with sugar, water, and a touch of almond or orange blossom water for added depth. Simmer the chestnuts to release their creamy, earthy sweetness, strain to achieve a smooth texture, and finish with vanilla extract for a warm, rounded flavor. This syrup is perfect for cocktails, coffee, or drizzling over desserts.