Cut butter into pieces, combine with Crisco. Using the whisk attachment, whip butter for 5-7 minutes, scraping down the bowl occasionally. Beat until butter looks light in color.
Add 2 C powdered sugar and mix on low speed until incorporated into butter mixture.
Add 2 tsp vanilla extract and mix to combine.
Add additional 2 C powdered sugar and beat on low speed until sugar is incorporated. Increase speed to medium-high and beat for 3 minutes.
Add last 1 C powdered sugar along with 2 tbsp heavy whipping cream, ½ tsp vanilla extract and butter extract. Beat on low until ingredients start to mix together. Increase speed to medium-high and beat for another 3-5 minutes to whip additional air into the frosting