01 -
Set your oven to 350°F and get a 9x9-inch pan ready with parchment paper lining.
02 -
In a pan over medium heat, cook raspberries, sugar, and lemon juice for 5 minutes, stirring now and then. If you don’t like seeds, strain them out.
03 -
Melt butter in a small saucepan. Take it off the heat and stir in cocoa, sugar, and a bit of salt.
04 -
Drop in some vanilla and the eggs, adding one at a time while mixing until smooth.
05 -
Gently fold in the flour without overmixing, then toss in the chocolate chips.
06 -
Pour the brownie batter into the pan. Add spoonfuls of the raspberry mixture on top, then use a knife to swirl it all around for a marbled look.
07 -
Bake for 25-30 minutes. The edges should look done, but the center will still be gooey. Let it cool completely before you cut into it.