In a large bowl add the flour, 1 cup of sugar, baking powder, and salt. Mix until combined.
Add the chilled shortening to the flour mixture and mix using a fork or pastry cutter until you see tiny pieces of shortening throughout the mixture.
Add the egg and vanilla extract to the flour mixture and mix until combined set aside. (See note)
Strain the peaches and reserve the juice for another recipe or drink later on. Cut the peaches into 1 inch pieces. Add the ¼ cup of sugar and cornstarch. Mix until combined.
Preheat the oven to 375 degrees.
Take half of the dough mixture and press it into a 13x9 baking pan sprayed with Pam. (See note)
Top the crust with the peach mixture. Sprinkle the remaining dough on top of the peaches. Bake for 35-40 minutes.
Once the bars are baked let them cool for about 40 minutes. Once cooled you can cut them however you would like. I cut them into 12 bars but these can be cut into much smaller pieces for any kind of party. These are delicious and will go fast. Enjoy!