01 - Bring water to a boil in a small saucepan. Add tea bags, cinnamon stick, whole cloves, and lemon zest. Remove from the heat and allow to steep for 8 minutes. Remove tea bags and strain; let cool completely and discard the spices and zest.
02 - Preheat oven to 350°F (175°C). Line a 9x9-inch baking pan with parchment paper, ensuring an overhang for easy removal.
03 - In a large mixing bowl, whisk together melted butter, packed light brown sugar, and granulated sugar until smooth. Add eggs, vanilla extract, and cooled spiced sweet tea; whisk evenly. In a separate bowl, stir together flour, baking powder, and salt. Fold dry ingredients into wet mixture until just combined. Do not overmix. Spread two-thirds of the batter evenly into the prepared pan.
04 - Beat softened cream cheese in a medium bowl until smooth. Add granulated sugar, egg, brewed spiced sweet tea, and lemon juice; continue beating until creamy and free of lumps.
05 - Dollop cheesecake mixture over the blondie base. Spoon remaining blondie batter in small mounds over the cheesecake layer. Using a knife or skewer, gently swirl the mixtures together to create a marbled appearance.
06 - Bake for 38 to 42 minutes, or until the center is just set and edges are golden brown.
07 - Allow to cool completely in the pan. For neat cuts, use a sharp knife to slice into squares after cooling.