No bake eggless ferrero rocher mousse cake

For the bottom layer

standard size Oreos with cream inside – 10 pieces

hazelnuts* (optional)

melted butter

For the middle layer

/ 1.5 cups chilled heavy whipping cream

/ ½ cup Nutella

/ 205 grams / 1 cup approx. semi - sweet Baking/cooking chocolate chopped

/ 1/4 cup cream more for melting chocolate

corn flour / cornstarch

For the top layer

oz/113 grams / 3/ 4cups approx. semi – sweet cooking/ baking chocolate / chocolate chips

/ 75 ml heavy cream

For decoration

flowers

Ferrero Rocher’s