Add the flour in one step and mix with a spatula from the bottom up and around the circle.
Mix the butter and milk at room temperature. Add three tbsp of dough to the milk-oil mixture and mix until smooth.
PS. a Few words about flour. Usually, in the preparation of biscuits, flour is used for cakes. In my region, the flour is heavier, if you can say so, and I bake with regular flour. If you doubt the quality of flour, then in this recipe, replace 20 g of flour with 20 g of corn starch.70 flour + 20 corn starch=90 g