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1
Preheat oven to 325 degrees F.
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2
Dice the butter and put into a food processor with the flour, and sugar.
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3
Pulse in short intervals until the mixture is crumbly and resembles coarse bread crumbs.
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4
Add the cold egg yolk, salt and water to the mixture, this will make a pastry dough.
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5
Place the dough onto a floured surface and form into a ball.
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6
Wrap in plastic and place in the refrigerator until cold.
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7
*Cook's Note: If you don't have a food processor you can use a pastry cutter, a fork or your hands.
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8
If using your hands be careful not to over mix or allow your hands to warm the butter.
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9
When the dough is cold, place on a floured surface and roll out to cover the bottom of a 13 by 9-inch pan.
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10
Bake for 20 minutes.
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11
Whisk eggs together and set aside.
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12
In a separate bowl mix the sugar, flour and baking powder together.
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13
Add the lemon zest and juice.
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14
Mix in the eggs until well combined.
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15
Pour the mixture over the par baked crust.
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16
Place in the oven and bake for 30 minutes until the center has set firmly.
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17
Remove from the oven and allow it to cool.
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18
Cut into bars.
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19
In a large bowl, mix all ingredients together and blend with a hand mixer on low until creamy.
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20
Pipe frosting onto lemon bars.
