Warm the apple base: Pour the apple cider or juice into a small saucepan. Heat over medium until it gently simmers. Let it bubble for 5–7 minutes to reduce slightly and concentrate the flavor.
Add dairy and caramel: Lower the heat.
Whisk in the milk, heavy cream, caramel sauce, cinnamon, and a pinch of salt. Keep the heat low to avoid scalding.
Simmer gently: Cook for 2–3 minutes, stirring often. Do not boil.
You’re aiming for steam and tiny bubbles around the edges.
Optional thickening: If you want a richer, thicker creamer, whisk in the cornstarch slurry and cook for 1 minute more, stirring constantly, until slightly thickened.
Finish with vanilla: Remove from heat. Stir in the vanilla extract. Taste and adjust sweetness or spice if needed.
Strain (optional): For an ultra-smooth finish, pour through a fine-mesh strainer into a heatproof jar.
Cool and store: Let it cool to room temperature, then seal and refrigerate.
Shake before each use.