01 - Preheat oven to 350°F. Spread almonds on a baking sheet and roast for 10-12 minutes until golden brown and fragrant. Allow to cool completely before proceeding.
02 - Combine cooled roasted almonds, water, honey or maple syrup, vanilla extract, and sea salt in a blender. Process on high speed for 2-3 minutes until completely smooth and milky.
03 - Pour the blended mixture through a fine mesh sieve or nut milk bag into a pitcher, pressing firmly to extract all liquid. Discard or reserve almond pulp for another use.
04 - Whisk in the heavy cream or coconut cream until fully incorporated and smooth.
05 - Refrigerate the almond milk for at least 1 hour until thoroughly chilled.
06 - Pour over ice cubes in chilled glasses. Garnish with roasted almond slivers or a dusting of cinnamon if desired. Serve immediately.