Preheat oven to 180 degrees C. Lightly grease or line baking trays with baking paper.
Combine the sugar, beaten egg and sour cream together. Mix in the flour, bicarb soda and salt. Blend thoroughly.
Divide dough in half and form each half into a long roll. (Note: If your kitchen is warm, keep the half of dough you're not working with in the refrigerator.)
Cut off a narrow slice of dough. Roll lightly with hands on lightly floured board into pencil-like strip about 20cm long. Form into a figure "8" and pinch ends together. Place on baking tray. Repeat with remaining dough.