Lemon-Lime Bars

Lemon-Lime Bars

Makes 20 bars
Author Wendy Sondov themondaybox.com


  • 1 cup all-purpose flour
  • ½ teaspoon baking powder
  • ¼ teaspoon salt
  • ½ cup butter flavor vegetable shortening
  • 1 ¼ cups granulated sugar
  • 2 large eggs + 1 egg yolk
  • 1 teaspoon vanilla extract
  • 1 teaspoon lemon zest zest of ½ lemon
  • 2 ½ teaspoons lemon juice
  • 2 drops yellow food coloring gel
  • 1 teaspoon lime juice
  • 2 ½ teaspoons lime juice
  • 2 drops green food coloring gel
  • ½ cup plus ½ cup white chocolate chips
  • ¼ cup yellow decorating sugar
  • ¼ cup green decorating sugar


  1. Preheat oven to 350 degrees F. Line a 9” x 9” pan with foil extending over the edges. Spray the foil with non-stick spray.
  2. In a medium bowl, whisk together flour, baking powder, salt.
  3. Place vegetable shortening in large microwave safe bowl and microwave about 1 minute until melted.
  4. Into the bowl of melted shortening add flour mixture, sugar, eggs and yolk, and vanilla. Mix with a large spoon until smooth.
  5. Remove 1 cup of batter and place in a medium bowl with lemon zest, lemon juice, and yellow food coloring. Mix until smooth. Stir in ½ cup of white chocolate chips.
  6. To the batter remaining in the large bowl add lime zest, lime juice, and green food coloring. Mix until smooth. Stir in ½ cup of white chocolate chips.
  7. Place spoonfuls of batter into the prepared pan, alternating colors. When all batter is in the baking pan, use a knife to spread batter up to all edges. Then run the knife up and down the length of the pan to create a marbled effect.
  8. Sprinkle the decorating sugar, in a random pattern of colors, until the top of the batter is completely covered. With fingertips, press the sugar gently to make sure it sticks to the batter.
  9. Bake for 25-3) minutes until just golden brown and a toothpick inserted in the center comes out clean.
  10. Cool completely in pan on a wire rack.
  11. When cool, remove from pan by lifting the overhanging foil.
  12. Cut into bars.
  13. Store at room temperature in an airtight container or ziplock bag for up to 2 weeks.

Packing Tips

Double wrap bars individually or in pairs in plastic wrap before placing in airtight containers or ziplock bags. For longer shipping times, I recommend not cutting into individual bars, but double wrapping the entire square to help keep the chewy texture as long as possible.