In a large bowl beat butter and sugar until light and fluffy
Add vanilla and egg
Blend well Lightly spoon flour into measuring cup and level off
Stir in flour and baking powder
Mix well Divide dough int 4 equal parts
On lightly floured surface shape each part into 12 x 34-inch roll
Place on ungreased cookie sheet
Using handle of wooden spoon or finger make a depression about 12-inch wide and 14-inch deep lengthwise down center of each roll Fill each roll with 2 tablespoons of jelly Bake for 15 to 20 minutes until golden brown Cool slightly Cut diagonally into bars