1Prepare the crunch layer: Preheat oven to 350°F (175°C). In a bowl, mix puffed rice with warm corn syrup, sugar, and salt until evenly coated. Spread on a lined baking sheet and bake for 10-15 minutes until golden brown. Melt white chocolate with 1 tsp neutral oil in a heatproof bowl, microwaving in 10-second intervals, stirring between each, until 80% melted. Remove and stir continuously until smooth, letting residual heat fully melt the chocolate. Toss melted chocolate into the caramelized puffed rice. Press into a cake pan, reserving ⅓ cup for garnish. Chill for 20 minutes.
2Prepare the crunch layer: Preheat oven to 350°F (175°C). In a bowl, mix puffed rice with warm corn syrup, sugar, and salt until evenly coated. Spread on a lined baking sheet and bake for 10-15 minutes until golden brown. Melt white chocolate with 1 tsp neutral oil in a heatproof bowl, microwaving in 10-second intervals, stirring between each, until 80% melted. Remove and stir continuously until smooth, letting residual heat fully melt the chocolate. Toss melted chocolate into the caramelized puffed rice. Press into a cake pan, reserving ⅓ cup for garnish. Chill for 20 minutes.
3Prepare the crunch layer: Preheat oven to 350°F (175°C). In a bowl, mix puffed rice with warm corn syrup, sugar, and salt until evenly coated. Spread on a lined baking sheet and bake for 10-15 minutes until golden brown. Melt white chocolate with 1 tsp neutral oil in a heatproof bowl, microwaving in 10-second intervals, stirring between each, until 80% melted. Remove and stir continuously until smooth, letting residual heat fully melt the chocolate. Toss melted chocolate into the caramelized puffed rice. Press into a cake pan, reserving ⅓ cup for garnish. Chill for 20 minutes.
4Make the ube mousse: Bloom gelatin by mixing it with cold water, letting it sit for 5 minutes until dissolved. Blend ube jam, condensed milk, vanilla, ube extract, and bloomed gelatin until smooth. In a separate bowl, whip heavy cream to soft peaks. Gradually fold in the ube mixture until fully combined.
5Make the ube mousse: Bloom gelatin by mixing it with cold water, letting it sit for 5 minutes until dissolved. Blend ube jam, condensed milk, vanilla, ube extract, and bloomed gelatin until smooth. In a separate bowl, whip heavy cream to soft peaks. Gradually fold in the ube mixture until fully combined.
6Make the ube mousse: Bloom gelatin by mixing it with cold water, letting it sit for 5 minutes until dissolved. Blend ube jam, condensed milk, vanilla, ube extract, and bloomed gelatin until smooth. In a separate bowl, whip heavy cream to soft peaks. Gradually fold in the ube mixture until fully combined.
7Prepare the ganache: Heat cream and milk in a saucepan until just boiling. Pour over chopped white chocolate and whisk until smooth. Stir in butter until fully incorporated. Let cool completely.
8Prepare the ganache: Heat cream and milk in a saucepan until just boiling. Pour over chopped white chocolate and whisk until smooth. Stir in butter until fully incorporated. Let cool completely.
9Prepare the ganache: Heat cream and milk in a saucepan until just boiling. Pour over chopped white chocolate and whisk until smooth. Stir in butter until fully incorporated. Let cool completely.
10Assemble the cake: Pour mousse over the crunch layer, smoothing with an offset spatula. Tap the pan to remove air bubbles, then freeze for at least 3 hours or overnight.
11Assemble the cake: Pour mousse over the crunch layer, smoothing with an offset spatula. Tap the pan to remove air bubbles, then freeze for at least 3 hours or overnight.
12Assemble the cake: Pour mousse over the crunch layer, smoothing with an offset spatula. Tap the pan to remove air bubbles, then freeze for at least 3 hours or overnight.
13Glaze & Serve: Unmold frozen cake onto a wire rack over a sheet tray. Pour ganache over, smoothing with a spatula. Refrigerate for 2 hours before serving.
14Glaze & Serve: Unmold frozen cake onto a wire rack over a sheet tray. Pour ganache over, smoothing with a spatula. Refrigerate for 2 hours before serving.
15Glaze & Serve: Unmold frozen cake onto a wire rack over a sheet tray. Pour ganache over, smoothing with a spatula. Refrigerate for 2 hours before serving.