Cookie Milk: The Ultimate Brown Butter Vanilla Infusion

Instructions:

1. Brown the Butter: Melt the butter in the medium saucepan over medium heat. Continue cooking, stirring frequently, until the butter foams, the milk solids drop to the bottom, and they turn deep amber/nut brown. It should smell intensely nutty—like toasted hazelnuts.
2. Stop Cooking: Immediately remove the saucepan from the heat once browned. Pour the hot brown butter (including the browned milk solids) into a small, heatproof bowl to prevent residual heat from burning it. Set aside briefly.
3. Combine Milk Base: In the same saucepan, combine the whole milk, brown sugar, and sea salt.
4. Heat Gently: Heat the mixture over medium-low heat, stirring occasionally, until the sugar is fully dissolved and the milk is steaming hot but not boiling. Remove from the heat.
5. Add Flavour Agents: Whisk the reserved hot brown butter (solids and all) into the warm milk mixture. Add the scraped vanilla bean seeds and the pod, and the optional cookie crumbs.
6. Steep the Milk: Cover the saucepan and let the mixture steep and infuse at room temperature for 30 minutes. This allows the fat and flavour compounds to fully penetrate the milk.
7. Strain the Milk: Set the fine-mesh sieve over your storage container or jug. Carefully pour the steeped milk through the sieve.
8. Extract Remaining Flavour: Use a rubber spatula to press down firmly on the solids (crumbs and vanilla pod) in the sieve to extract all the remaining brown butter and liquid goodness. Discard the solids.
9. Chill Thoroughly: Seal the container and refrigerate the Cookie Milk for at least 2 hours, or ideally overnight, until it is completely cold. Serving chilled is non-negotiable for the best flavour.
10. Stir and Serve: Give the milk a good stir before serving, as the heavier flavour molecules may settle slightly. Serve over ice, if desired.