In a large bowl, beat butter and sugars with a mixer at high speed until fluffy, 3 to 4 minutes, stopping occasionally to scrape sides of bowl. Add eggs, one at a time, beating well after each addition. Beat in vanilla
In a medium bowl, whisk together flour, baking powder, and salt. With mixer on low, gradually add flour mixture to butter mixture, beating just until combined. Stir in butterscotch and pecans. Divide dough among 12 (4 ½-inch) cast-iron skillets.
Bake until lightly browned, about 30 minutes. Let cool for 10 minutes. Serve with ice cream, if desired.
Notes
Tip: Walnuts or peanuts can be used instead of pecans, and chocolate or peanut butter morsels can be swapped for butterscotch. Mix and match to find your favorite flavor combinations.
Recipe by Southern Cast Iron at https://southerncastiron.com/butterscotch-pecan-cookies/