A vegan, tropical take on the classic Orange Julius.
You can buy frozen pineapple tidbits or cut your own. In a pinch, I'll snag a bag from Trader Joe's, which seems to source extra sweet and flavorful pineapples (their frozen mango chunks are great, too). When I have the time, I'll break down a whole pineapple, then freeze the pieces in a single layer on a baking sheet before transferring them to a freezer bag.
Orange extract is an unusual ingredient to have on hand. You can leave it out if you prefer, or substitute a half teaspoon of freshly grated orange zest. Likewise, if you don't have whole vanilla bean paste, just use vanilla extract, but double or triple the amount according to taste.