
1¼ cups unsalted butter, melted
4 large eggs, at room temperature
1 cup granulated sugar
2 tablespoons orange zest, divided
1 tablespoon fresh orange juice
1 tablespoon vanilla extract
½ teaspoon coarse kosher salt
2 cups all-purpose flour
½ teaspoon baking powder
1 (10-ounce) package chocolate-flavored melting wafers