Decide your use: topping (spoon), piping (hold shape), or mixing into dessert (fold-friendly).
Pick the closest substitute from the table by texture: thick + tangy (Greek yogurt), rich + stable (mascarpone/cream cheese), or dairy-free whip (chilled coconut cream).
Use the listed ratio for closest thickness; if your substitute is wetter, chill 15 minutes or strain briefly, and if it’s too thick, whisk in 1–2 teaspoons of cold milk.
Sweeten and flavor-match: add a pinch of salt for tangy bases, or a little powdered sugar/vanilla for pudding/tofu.
Taste and adjust immediately, then serve or chill until set (especially for coconut cream and pudding).