Multicolor chocolate brownie

Dark chocolate mix
60 grs
90 grs white chocolate chips
125 grs glazed sugar
1 table spoon vanilla
1 pre beaten egg

Preparation 

1. Pre heat oven at 180 c lightly butter the pan with butter or oil, cover the pan with wax paper.
2. to elaborated  the chocolate  batter ,  put chocolate and butter in a double souse pan mix until obtaining a creamy substance , in a small cooking  bowl with a wooden spoon beat sugar, vanilla,  egg   and  add the  dark chocolate mix  , flour  and  mix the batter .
3. to elaborated  the white chocolate batter,  cook  white chocolate  and butter in a double souse pan , with a wooden spoon beat sugar , vanilla egg  , add the white chocolate mix  add  flour   with out beating to hard
4. alternated white batter with dark in the same pan with out mixing 
5. Bake for 35 minutes, let cool down then cut in squares.