Add all ingredients (ice cream, cashew milk, cocoa powder, espresso, cashew butter, vanilla extract, and ice cubes if using) to a blender. Tip: For a thicker shake, freeze the glass beforehand.

Blend on high speed until smooth and creamy, about 1-2 minutes. Tip: Scrape down the sides if needed to ensure even blending.

Taste and adjust sweetness or coffee strength if desired by adding more cocoa or espresso. Tip: For extra richness, drizzle chocolate syrup inside the glass before pouring.

Pour into chilled glasses and serve immediately with a spoon or straw. Tip: Garnish with whipped cream and crushed cashews for a café-style finish.