1Move oven rack to middle position and preheat to 350^. Grease of spray a 12-cup muffin pan with butter.
Pulse the flour, 1/4 c. of the coconut, brown sugar in a food processor until combined. Add the cold butter pieces and pulse until the mixture resembles wet sand with pea-sized pieces, about 5 pulses.
Put 1 heaping Tablespoon of the mixture in each muffin cup and press to make even rounds. Bake until the crusts are golden, about 15-20 minutes.
2Remove the pan from the oven and sprinkle the chocolate evenly over each crust. Turn off the oven; return the pan to the oven to melt the chocolate, about 3 minutes. Sprinkle each crust with 1 Tablespoon of the remaining coconut. Cool slightly, then freeze crusts in the pan until set, about 15 minutes.
3With a thin spatula, gently remove each crust from the muffin pan. Top with a small scoop of coconut ice cream, drizzle with dulce de leche and garnish with more coconut.