Reserve 2 Tbsp. flour. Combine remaining flour with 1 Tbsp. sugar, baking powder and salt on clean work surface; make 10-inch well in centre. Whisk egg, butter and 3/4 cup water until blended. Pour small amount into centre of flour mixture; knead until blended. Gradually add remaining egg mixture, kneading after each addition until blended. Continue to knead dough until smooth and elastic. Divide dough into 12 pieces; roll each into ball. Place in large bowl; cover with damp kitchen towel. Let stand 30 min.