Mix flour, salt, baking powder, and sugar.

Combine egg, milk, and vanilla in separate bowl then add to mixture of dry ingredients.

Mix only until moistened throughout.

Knead on floured board or counter.

Spray surface with cooking spray and roll 1/3in thick.

Cut into 2x2in squares and fry in oil until golden brown on both sides.

Remove from pan and drain on paper towels.

Coat with powdered sugar, as desired.