In a medium saucepan over medium heat, combine 1 cup cream, milk, sugar, vanilla bean paste, raspberries, rose water, and salt. Bring to a boil; remove from heat, and strain, pressing solids to release liquid. Discard solids. Cool liquid completely. Transfer to a storage container; cover with plastic wrap, and refrigerate for 6 hours, or overnight.
Transfer ½ cup cream mixture to a small bowl. Sprinkle with gelatin, and allow it to soften, about 5 minutes.
In a medium saucepan over medium-high heat, bring remaining cream mixture to a boil; reduce heat, and add gelatin mixture, whisking until gelatin is dissolved, about 2 minutes. Strain mixture into a stainless-steel bowl placed in an ice-water bath, stirring occasionally, for about 15 minutes.
In a large bowl and using a mixer at high speed, beat remaining 3 cups cream and confectioners’ sugar until soft peaks form, about 3 minutes. Add gelatin mixture; beat at lowest speed until combined. Pour mixture into a 10-cup silicone mould or into 10 (1-cup) moulds. Cover with plastic wrap, and refrigerate for 6 hours, or overnight.
To unmould, gently run a knife around the inside edges of the mould to separate gelatin from the sides. Set mould in lukewarm water for 30 seconds. Invert mould onto a serving platter, and gently jiggle until gelatin releases. Garnish with edible flowers, if desired.
Notes
*Vanilla bean paste is made by infusing vanilla beans in a syrup made with sugar, water, and some type of thickener. It is available at specialty-foods stores and can be used in place of vanilla extract.
Recipe by Victoria at https://victoriamag.com/rose-raspberry-infused-blancmange-recipe/