Preheat the oven to 350°F (175°C). Line a 60-cup mini muffin pan with paper liners and set aside.
In a large bowl, beat the softened cream cheese and coconut oil (or butter) until smooth.
Add the sugar and continue to whip until fully incorporated, then add eggs one at a time, mixing after each addition.
Scrape in the vanilla bean caviar (scraped seeds) and mix briefly, scraping the sides of the bowl to combine.
In a small bowl, whisk together the all-purpose flour, baking powder, baking soda, and salt.
Alternate adding the dry ingredients and 1 cup almond vanilla milk to the cream cheese mixture, beginning and ending with the dry ingredients; stir until just combined without overmixing.
Spoon the batter into the prepared mini liners, filling each about 2/3 full.
Reduce oven temperature to 325°F (163°C) and bake for 12–15 minutes, rotating the pan halfway through; bake until a toothpick inserted into a cupcake center comes out clean.
Remove cupcakes from the oven and allow them to cool completely in the pan or on a wire rack before frosting.
To make the frosting, beat the room-temperature butter with the powdered sugar and vanilla until combined; then stream in up to 4 tablespoons organic almond vanilla milk while mixing on low until the buttercream becomes thick and creamy.
Scrape the bowl and whip the frosting briefly on medium speed for a light texture.
Frost the cooled mini cupcakes using a large piping tip or a knife, and top with sprinkles if desired.