Prepare 2 baking trays by lining them with a piece of baking paper and preheat the oven to 200C. We will only need one tray for baking though.
Add the flours and sugar to a mixing bowl. Finely cute the butter and crumble the pieces into the bowl.
Add the plant milk and vanilla extract and mix everything with your hands until it forms a unit dough that you can shape into a ball. The dough might not seem to come together at first, so keep kneading! Only when the butter and plant milk is well incorporated into the dough and it is still too dry and crumbly, add a tablespoon more of the milk.
Roll out the dough into a rectangular shape, around 0,3 cm thick. It works best if you do this between two pieces of baking paper to make sure the dough doesn't stick onto the pastry roller.
Cut out 14 squares, in the size of about 4x6 cm. You will have to roll out the dough again inbetween. carefully divide the squares between the lined baking trays. Once you are finished an all of the dough is used up.
Before continuing with the filling for the pop tarts, set aside 80g of the jam. We will need it later for the frosting.
Add around 2 good Tsp of the jam onto the middle of 7 of the square. Spread it out, leaving around 0,5 cm space to the edges. Place another rectangle on top of each jam coated square.
Seal off the edges using a fork. Press the top of the fork around 0,5 cm far into the edges. You can also create a pattern of little holes in the top of the pop tarts by slightly poking tooth picks into the top.
If using the glaze, mix all the ingredients together and brush on top of each pop tart. Reduce the heat of the oven to 180C. Bake the pop tarts for around 10 minutes until the tops are golden. Remove from the oven and let cool completely.