Preheat oven to 350 degrees. Lightly spray and flour 8 wells of a cupcake pan or 8 mini bundts, set aside.
In the bowl of a stand mixer, cream the butter and sugar until light and fluffy, about 2-3 minutes. Add the vanilla extract and the vanilla bean paste. With mixing speed on low, add the eggs one at a time, mixing until just combined.
In a medium size mixing bowl whisk together flour, cake flour, baking powder, baking soda, and salt. In a glass measuring cup mix together sour cream and milk. With mixing speed on low, alternate dry and wet ingredients, mix until batter is smooth and homogeneous (being careful not to over mix).
Scoop the batter into the cupcake liners, filling each ⅔ of the way full. Place in the oven and bake for 17-19 minutes or until the cupcakes spring back when touched. Remove from oven and allow to cool in pans for 5 minutes before removing and transferring to a wire rack to cool completely (about 20 minutes).
Meanwhile, for the whipped cream, place all of the ingredients in a medium size mixing bowl (or the bowl of a stand mixer fitted with the whisk attachment) and beat with a hand mixer until it reaches a desired consistency. For these trifles I like mine to be slightly more soft, usually I whip it until it's stiff.
When the cakes are cool, chop them up and layer the ingredients in the glasses. I like to do cake, whipped cream and strawberries. Repeat the process until all of the ingredients are gone. Chill or serve immediately.
Notes
-I made these in 12 oz glasses, but you can make them in smaller cups or make one large trifle. This recipe is easy to make in just about anything, just know the yield may vary.