Add the vanilla ice cream, milk, salted caramel sauce, crushed pretzels, and vanilla extract to a blender. Tip: For a thicker shake, use frozen ice cream straight from the freezer.

Blend on high speed until smooth and creamy, about 30-45 seconds. Tip: If the shake is too thick, add a splash more milk. If too thin, add another scoop of ice cream.

Taste and adjust sweetness or saltiness as needed with extra caramel or a pinch of sea salt. Tip: The pretzels add saltiness, so go easy on extra salt.

Pour into tall glasses, drizzle with extra caramel sauce, and sprinkle with crushed pretzels. Tip: For a fancy touch, rim the glasses with caramel and dip in pretzel crumbs.