Line 8-inch baking pan with foil, extending foil up over edges of pan.
Peanut Butter Layer
Microwave 1/2 cup sweetened condensed milk, peanut butter and white baking chips in medium microwave-safe bowl on HIGH 1 minute or until melted and smooth when stirred.
Stir in 1/2 teaspoon vanilla and almond extract until blended.
Stir in peanuts.
Chocolate Layer
Microwave remaining sweetened condensed milk, chocolate chips and salt in medium microwave-safe bowl on HIGH 1 minute or until melted and smooth when stirred.
Stir in remaining 1/2 teaspoon vanilla until blended.
Spoon peanut butter and chocolate mixtures into prepared pan, alternating heaping tablespoonfuls of both mixtures.
When complete, with table knife or metal spatula, swirl mixtures to create a marbled appearance. Pat evenly to flatten top surface. Garnish with additional peanuts if desired
Chill 1 hour or until firm. Remove fudge from pan by lifting edges of foil. Remove foil.
Cut into 1-inch squares.
Notes
Stove Top Method:Peanut Butter fudge: In a sauce pan over medium heat, combine 1/2 cup sweetened condensed milk, peanut butter and white baking chips. Stir until melted. White chocolate burns easily so stir often Stir in 1/2 teaspoon vanilla and almond extract until blended. Stir in peanuts.Chocolate fudge: In a sauce pan over medium heat, add remaining sweetened condensed milk, chocolate chips and salt and stir until melted and smooth. Stir in remaining 1/2 teaspoon vanilla until blended.Continue with Step 7 above