Chocolate Chunk Brownies

• 3 eggs (chilled)
• 400 gr semisweet chocolate (finely chopped)
• 220 gr swiss dark chocolate chunks divided (cut)
• 200 gr coarsely walnut (chopped halves)
• 200 gr granulated sugar
• 160 gr all purpose flour
• 85 gr corn syrup (light)
• 75 gr butter (unsalted)
• 60 ml water
• 14 gr vanilla extract