Key Lime and White Chocolate Sourdough Blondies
These key lime and white chocolate sourdough blondies combine the tang of key lime pie and richness of white chocolate into a the perfect handheld treat. Serve these at your next picnic or office gathering for a perfect sharable dessert!
Equipment
- 9x13" Pan
- Measuring cups and spoons
- Bowls
- Whisk and spatula
- Zester or cheese grater
- Stainless steel frying pan or saucepan or other light colored pan
Ingredients
- 1 ¾ cups All-purpose flour
- 1 ½ tsp Baking powder
- ¾ tsp Salt omit if using salted butter
- 15 tbsp Unsalted butter
- 1 ¾ cups Brown sugar light or dark brown sugar
- ½ cup Sourdough discard or 130 grams
- 2 tsp Pure vanilla extract
- 1 tbsp Lime zest or 9 grams
- 1 ½ cups White chocolate chips
For the Icing: (optional)
- 8 ounces Cream cheese softened
- 1 ⅔ cups White chocolate chips Plus additional for melting and drizzling on top of the bars, if desired.
- 1 ½ cups Powdered sugar
- 2 tbsp Lime juice
- 1 tsp Lime zest
Instructions
For the sourdough blondie batter:
- Preheat oven to 350° F. Line a 9x13 inch baking pan with parchment paper, spray with cooking oil and set aside.
- In a stainless steel or light-colored saucepan, melt butter over medium heat. The butter will form bubbles and foam, so you'll need to push it aside with a spoon in order to watch the color of your melted butter. Once the milk solids have turned golden brown, remove from heat. Pour the butter into a separate bowl and set aside to cool.
- In a large bowl or stand mixer, combine butter and brown sugar. Stir to combine.
- Add the sourdough discard, eggs, vanilla extract, and zested lime and stir to combine.
- Fold in the white chocolate chips.
- Spread the batter evenly into the prepared baking pan using a rubber spatula or spoon.
- Bake for 22-25 minutes, or until the top of the bars are shiny and lightly golden brown. They may even appear slightly underbaked in the center.
- Remove from the oven and allow to cool on a wire rack.
- Once cool, drizzle with melted white chocolate, or top with cream cheese frosting (recipe below)
Optional cream cheese frosting:
- Combine the softened cream cheese, powdered sugar, lime zest, lime juice, and melted white chocolate and whisk until light and fluffy.
- Spread frosting on the cooled bars.
- Drizzle with melted white chocolate if desired.