This spring slush is a beautiful cultural fusion - creamy horchata meets fresh strawberry in the most refreshing way. The cinnamon-vanilla notes from the horchata base blend perfectly with bright strawberry flavor. It's like spring in a cup.
Combine the rice, whole milk, and ground cinnamon in a blender. Blend on high for 2 minutes until the rice is finely pulverized and the mixture is fragrant.
Add sweetened condensed milk, vanilla extract, and a pinch of salt. Blend for another 30 seconds until smooth. This creates the creamy horchata base that gives the Sonic slush its signature flavor.
Strain the mixture through a fine-mesh sieve into a large measuring cup to remove any rice grit.
Return the horchata base to the clean blender. Add frozen strawberries and blend until smooth and pink—this combination gives a bright, fruity layer Sonic is known for.
Add the crushed ice and blend in short pulses (about 10 seconds) just until the slush is thick but still has small ice pieces. Sonic's signature texture relies on nugget-style ice that is chewy, not watery.
Pour the Strawberry Horchata Cream Slush into chilled glasses, topping with a sprinkle of cinnamon for extra Sonic flair. Serve immediately for the best texture.