Preheat the oven to 180 degrees Celsius, and prepare a baking tray with nonstick spray.
In a mixing bowl, sift al the dry ingredients together, then add the butter, vanilla, egg and lemon flavorings and work it through with your hands. Keep working the dough until you are left with glossy smooth dough.
Refrigerate for 30 minutes.
Prepare the filling by mixing the butter, icing sugar and lemon flavoring in an electric mixer until fluffy, add lemon juice / more icing sugar until you get the desired spreadable consistency.
I used an amazing old style cookie press, but you can roll the dough out and use cookie cutters instead, by using a little extra flour for rolling.
Press the cookies onto the baking tray and bake for 10 minutes at 180 degrees Celsius. My cookies baked until just colored, please keep checking yours as oven temperatures may vary.
Let them cool, spread with filling and assemble your Lemon Cream sandwiches with as much filling as you want!