Preheat your oven to 350 degrees Fahrenheit.
In a large bowl, combine the flour, 2 Tbsp granulated sugar, and salt until evenly dispersed.
Use a stand mixer or an electric hand mixer to add the melted butter and vanilla, mixing until fully combined.
Line a glass 8x8 pan with parchment paper. Then pat the dough into the bottom and slightly up the sides of the pan. Use a fork to prick holes in the dough. Bake in the preheated oven for 25 minutes. Remove from the oven and allow it to cool slightly.
In a medium pot, add the frozen strawberries and the remaining granulated sugar. Heat over medium heat until the strawberries start to release juices.
Keep cooking until you bring the liquid to a boil. Then add the 3 oz package of strawberry jello powder. Remove from the heat and allow it to cool slightly.
Pour over the shortbread crust and refrigerate until the dessert sets up. Cut into bars, serve and enjoy!