Salted Caramel Cookie Bars with Oatmeal Chocolate Chip - Zest Plate

Ingredients

• 150g granulated sugar
• 90g water
• 4 1/2 tbsp unsalted butter, sliced
• 100g heavy cream, room temperature
• 1 tsp vanilla extract
• Kosher salt, hefty pinch
• 60g all-purpose flour
• 95g quick oats
• 165g all-purpose flour
• 1/2 tsp baking powder
• 1/2 tsp kosher salt
• 110g unsalted butter, room temperature
• 210g dark brown sugar, packed
• 1 large egg + 1 egg yolk
• 2 tsp vanilla extract
• 85g semisweet chocolate chips
• 130g dark chocolate chips
• 95g walnuts or pecans, finely chopped
• Flaky sea salt, for sprinkling