01 -
Preheat oven to 175°C. Line a 23x33 cm baking pan with parchment paper.
02 -
In a mixing bowl, sift together cake flour, baking powder, and salt. Set aside.
03 -
In a large bowl, beat eggs and granulated sugar using an electric mixer on high speed for 6–8 minutes until pale, thick, and tripled in volume.
04 -
In a separate bowl, whisk together ube halaya, milk, vegetable oil, ube extract, and vanilla extract until smooth.
05 -
Gently fold the ube mixture into the beaten eggs. Sift the dry ingredients over the mixture and carefully fold until just incorporated.
06 -
Pour batter into the prepared pan and smooth the top. Bake for 22–25 minutes or until a toothpick inserted in the center comes out clean. Allow cake to cool completely.
07 -
Scoop chilled coconut cream (avoiding liquid) into a cold mixing bowl. Beat on high speed until soft peaks form. Add powdered sugar and vanilla extract; beat until stiff peaks form.
08 -
Divide the whipped coconut cream evenly into five bowls. Tint each with a different gel food coloring to achieve vibrant rainbow colors.
09 -
Once cake has cooled, cut into rounds or cubes sized to fit inside 250 ml glass jars.
10 -
To assemble, layer pieces of sponge cake, a swirl of one color of whipped coconut cream, and a sprinkle of rainbow sprinkles. Repeat layers, alternating colors for a rainbow effect.
11 -
Finish with additional whipped cream, rainbow sprinkles, and Pop Rocks just before serving. Optionally, garnish with edible glitter or gold leaf. Serve immediately for best fizz, or add Pop Rocks just before serving if storing jars in advance.