Preheat oven to 350 degrees Fahrenheit.
Mix the graham wafer crumbs, brown sugar, flour, baking powder, salt and melted butter in a bowl until well combined.
1 ½ cups (190 grams) graham wafer crumbs, 1/3 cup (70 grams) brown sugar, packed, 3/4 cup (110 grams) all purpose flour, 1/2 teaspoon baking powder, 1/4 teaspoon salt, 1/2 cup (125 mL) melted unsalted butter
Grease an 8 inch baking pan with a little butter or margarine.
Spread 2/3 of the wafer mixture in the pan, pressing down firmly so that you have a packed bottom layer. You do not need to have any of the wafer mixture coming up the sides of the pan.
In another bowl, combine the condensed milk, lemon juice and lemon rind. Mix well.
15 oz (450 ml)can of sweetened condensed milk, 1/2 cup (125 mL) fresh lemon juice, 1 teaspoon grated lemon rind
Pour this mixture over the graham layer in the pan and spread it out evenly.
Sprinkle the remaining graham crumb mix over the top of the lemon mixture.
Bake the lemon bars in the middle rack of your oven until the top is golden brown, 20-25 minutes. Cooking time will depend on your oven.
Let your dessert cool completely before cutting it into 1 inch squares.
Keep refrigerated.
Enjoy!