Mix cake batter according to directions

in a pan on med heat combine brown sugar, butter and 1/4 c of whipping cream

stir constantly until combined

remove from heat as soon as combined and melted (caramel will continue to cook in oven)

spray 9 inch round cake pans with cooking spray

split caramel mixture into pans evenly

sprinkle chopped nuts over caramel, 1/2 cup in each

gently add cake mix to pans equally (I use a spoon to add dollops around to avoid spreading caramel to sides)

bake per box directions

allow to cool in pan for 5 minutes

run knife around the edge to loosen cake

cut off any bump that may have formed while baking for a level surface

place a plate on top of pan and flip allow pan to sit upside down on plate to cool

while cake is cooling beat remaining heavy whipping cream until peaks form

add powdered sugar then continue to whip until stiff peaks form

add half whipping cream on caramel side(top) of bottom layer and spread

add top cake layer and then add remaining whipped cream to top and spread

crush Snickers bars (I freeze to make this easier)

sprinkle on top of cake

keep in fridge until ready to serve.