Pour 750ml red wine, 120ml orange juice, 60ml lemon juice, and 60ml simple syrup into a large pitcher and stir well to combine.
Add 4–5 whole cloves and 2 cinnamon sticks, stirring gently to distribute.
Cover and refrigerate for a minimum of 2 hours, or overnight for best results - the longer it sits, the more the spices bloom and integrate.
Before serving, taste and adjust sweetness with additional simple syrup if needed, adding 15ml at a time.
Fill wine glasses with ice, pour the sangria over, and garnish each glass with a fresh orange slice.
Sangria rewards patience - making it the night before allows the spices and citrus to fully meld with the wine, producing a far more cohesive and complex drink than one made to order. Use a bold, fruit-forward red like Garnacha or Tempranillo for the most authentic Spanish result.
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