Pour the red wine, orange juice, brandy, triple sec, and agave into a wine glass. Stir to combine.
Add ice, then garnish with fruit slices, cranberries, and a cinnamon stick.
Chill for about 15 minutes before serving to let the flavors blend, or enjoy right away.
Notes
Make Ahead for Better Flavor: Sangria tastes even better after resting. Refrigerate it for a few hours or up to 2 days so the fruit can infuse the wine. Keep it covered while chilling.
Use Fresh Orange Juice: Freshly squeezed juice gives the best flavor. Juice half of an orange and slice the other half for garnish.
Easily Scale the Recipe: Double the ingredients to make more servings or to prepare ahead for another day.
Adjust to Your Taste: Change the amount of wine, juice, or sweetener based on your preference. The flavor will vary depending on the fruit and wine you use.