Melt the Chocolate: In a microwave-safe bowl, combine the chopped dark chocolate and coconut oil (if using). Microwave in 30-second intervals, stirring between until the mixture is fully melted and smooth, creating a silky chocolate base.

Coat the Molds: Using a silicone dome mold, carefully coat the inside of each dome with a layer of the melted chocolate. Ensure it's thick enough to hold its shape, then place the mold in the freezer for about 15 minutes until set.

Bloom the Gelatin: In a small bowl, sprinkle the gelatin over the water and let it sit for about 5 minutes to bloom, becoming soft and sponge-like for the mousse.

Dissolve the Gelatin: Gently heat the bloomed gelatin in the microwave for about 10 seconds until it dissolves. Let it cool slightly before adding to the mousse mixture.

Whip the Cream: In a mixing bowl, whip together the heavy cream and granulated sugar until soft peaks form. Be careful not to overwhip, as you want a light and airy texture.

Mix the Matcha: In another bowl, mix the matcha powder with a few tablespoons of the whipped cream to create a smooth paste. Gently fold in the remaining whipped cream until fully combined, resulting in a lovely green hue.

Combine Ingredients: Stir in the dissolved gelatin and vanilla extract, folding gently to incorporate everything without deflating the fluffy mousse.

Fill the Molds: Remove the chocolate-coated molds from the freezer. Spoon or pipe the matcha mousse into each dome, filling them to the top for a beautiful finish.

Set the Mousse: Smooth the tops of the filled molds with a spatula, then return them to the freezer for at least 2 hours or until the mousse is fully set and firm to the touch.

Release the Domes: Once set, gently remove the mousse domes from the silicone molds. If needed, warm the mold slightly with your hands to help release the mousse easily.

Dust with Matcha: Optionally, dust the tops of the domes with additional matcha powder for a touch of elegance, enhancing their visual appeal.

Serve Delightfully: Place the domes on individual plates and serve immediately, delighting your guests with this stunning treat!