Heat oven to 325°F. Line a 9-inch baking pan with aluminum foil. Spray with nonstick cooking spray. Set aside.
In a large bowl with an electric mixer on medium-high, beat butter and granulated sugar until blended, about 2 minutes.
Beat in eggs, milk and vanilla until blended, about 1 minute. Gradually add flour, cocoa, salt and baking powder until blended, about 1 minute. Reserve 3/4 cup batter.
Spread remaining batter into prepared baking pan.
Meanwhile, using a hand or stand mixer with wire beaters on MEDIUM speed, beat cream cheese, granulated sugar, brown sugar and orange icing color until blended, about 2 minutes.
Beat in sour cream and add 1 egg at a time until all eggs are mixed in and mixture is fluffy.
Gently spread cream cheese mixture over brownie.
Drop reserved brownie batter by spoonful onto cream cheese mixture. Using a knife, drag the tip of the knife through each drop of brownie to create a swirled design.
Heat oven to 325°F. Line a 9-inch baking pan with aluminum foil. Spray with nonstick cooking spray. Set aside.
In a large bowl with an electric mixer on medium-high, beat butter and granulated sugar until blended, about 2 minutes.
Beat in eggs, milk and vanilla until blended, about 1 minute. Gradually add flour, cocoa, salt and baking powder until blended, about 1 minute. Reserve 3/4 cup batter.
Spread remaining batter into prepared baking pan.
Meanwhile, using a hand or stand mixer with wire beaters on MEDIUM speed, beat cream cheese, granulated sugar, brown sugar and orange icing color until blended, about 2 minutes.
Beat in sour cream and add 1 egg at a time until all eggs are mixed in and mixture is fluffy.
Gently spread cream cheese mixture over brownie.
Drop reserved brownie batter by spoonful onto cream cheese mixture. Using a knife, drag the tip of the knife through each drop of brownie to create a swirled design.