Put the rhubarb, sugar, and water in a non-reactive pot and bring to a boil, stirring constantly. Once the mixture is boiling, turn down the heat a bit and continue to boil gently until the rhubarb has softened. Some of it will be broken down and some will remain chunky. This will take about 5 or so minutes, after the mixture has come to a full boil.
Remove from the heat and stir in the vanilla. Let the mixture cool completely, then chill. This can be done up to 2 days in advance.
In a chilled bowl add the cream and confectioner's sugar. Whip to soft peaks. Add the sour cream and continue to whip briefly until combined and smooth.
Gently fold the rhubarb compote into the whipped cream with just a few turns of a flexible spatula or silicone spoon.
Spoon the fool into small glasses and either serve immediately, or chill until needed.
Notes
As written with 1/3 cup sugar the rhubarb compote is on the tart side, just the way I like it. Be sure to taste it for yourself and add a bit more sugar if you find it too tart. Remember that the whipped cream will blunt and balance that tartness in the final dessert.
Nutritional information is provided as a courtesy and is an estimate only. This information comes from online calculators. Although The View from Great Island attempts to provide accurate nutritional information, these figures are only estimates.
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