3 flaky double Recipes

heavy cream (1 litre, the best quality , and highest butterfat you can find) or 4 cups double cream (1 litre, the best quality, and highest butterfat you can find), plain yogurt (80ml, check the ingredients to make sure these do not contain any gums or stabilizers) or 1/3 cup creme fraiche (80ml, check the ingredients to make sure these do not contain any gums or stabilizers) or 1/3 cup buttermilk (80ml, check the ingredients to make sure these do not contain any gums or stabilizers), ice, salt, to taste (flaky fleur de sel or maldon salt is great)

all-purpose flour, kosher salt, vegetable shortening, cold unsalted butter , cut into 1/2 inch pieces (4 oz), ice water , plus, ice water