Preheat oven to 350 degrees and grease a 9x13 baking pan.
In the bowl of a stand mixer, combine the softened butter and sugar together for a few minutes until light and fluffy.
Add in vanilla extract and eggs, one at a time, mixing well after each addition.
In a separate bowl, sift together the flour, baking powder, and salt.
Slowly add in the dry ingredients into the wet ingredients and mix on low speed until everything is combined.
Add batter into prepared baking pan and bake 15-18 minutes.
Let cake cool in pan for 10 minutes and then spread the raspberry jelly on top while the cake is still warm. Let cake cool completely before frosting .