In the bowl of a stand mixer add the butter and sugar.
Using a paddle attachment, cream the butter and sugar on medium for 3 minutes.
The butter/sugar mixture will appear light in color and fluffy.
Add one egg at a time, beating directly after adding.
After adding each egg, and vanilla in the mixture.
Mix on low speed until combined.
In a large bowl add both types of flour, baking soda, cornstarch, and salt, whisk to combine.
Slowly add the flour mixture to the butter mixture while the mixer is on low speed.
Continue beating the mixture until a soft dough is made.
With the mixer on low beat in the butterscotch baking chips, mix on low until combined.
Using an ice cream scoop, scoop out a red velvet dough ball and place on a baking sheet.
Repeat till all dough is used. Set to the side.