Amish Sugar cookies

INGREDIENTS: For the Cookies: 120g butter softened (1/2 cup) 120ml vegetable oil (1/2 cup) 95g granulated sugar (1/2 cup) 65g icing sugar (1/2 cup) 1 large free range egg 1/2 tsp vanilla paste 315g plain flour (2 1/4 cups all purpose flour) 1/2 tsp bicarbonate of soda 1/2 tsp cream of tartar For optional Glaze: 130g icing sugar, sifted (1 cup) few drops vanilla warm water to thin cake decorating sprinkles INSTRUCTIONS: Preheat the oven to 190*C/375*F/ gas mark 5. Line several baking sheets with baking paper. Set aside. Beat the butter, oil and both sugars together until well blended. Beat in the egg and the vanilla. Sift the flour, soda and cream of tartar together and then stir this into the creamed mixture a bit at a time until well combined. Drop by walnut sized balls onto the prepared baking sheets, 2 inches apart. Bake for 8 to 10 minutes until lightly brown around the edges. Remove to a wire rack to cool completely. For the glaze whisk all ingredients together until smooth. Dip the tops of the cooled cookies into the glaze allowing any excess to run off. Sprinkle with the sprinkles and allow to set. For optional jam sugar cookies, using your forefinger make a dip in the centre of the cookies prior to baking and fill with 1/3 teaspoon of your favourite jam. Bake as above. https://theenglishkitchen.blogspot.com/2020/06/small-batch-amish-sugar-cookies.html