01 -
Preheat oven to 350°F. Grease an 8x8-inch baking pan and set aside.
02 -
In a medium mixing bowl, whisk egg whites and granulated sugar together until well combined.
03 -
Gently stir in coconut milk, sweetened shredded coconut, glutinous rice flour, and vanilla extract until batter is smooth and liquid.
04 -
Pour the batter evenly into the prepared pan. Bake in the preheated oven for 45 minutes.
05 -
Remove pan from oven. Evenly brush reserved egg yolks over the surface.
06 -
Switch oven to broil setting. Return the pan and broil 5 to 10 minutes, monitoring closely, until the top is golden brown.
07 -
Transfer pan to a wire rack and allow to cool completely.
08 -
Cover pan tightly with plastic wrap and refrigerate overnight or for a minimum of 8 hours.
09 -
Cut cake into squares or triangles. Serve well-chilled or at room temperature.