Ingredients

• 8 cups water, divided
• 1 cup quick-cooking oats
• 1 cinnamon stick
• 1/2 cup white sugar
• 2 teaspoons vanilla extract

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Instructions

1. Combine 5 cups water, quick-cooking oats, and cinnamon stick in a blender; blend until combined, about 1 minute.
2. Pour the oat mixture through a strainer, collecting the liquids in a pitcher and reserving the solids. Pour remaining water through the strainer containing the solids and into the pitcher. Add sugar and vanilla extract; refrigerate until chilled, about 1 hour.