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Ingredients
  

  • 3/4 cup butter room temperature
  • 1 cup sugar
  • 4 large eggs
  • 175 g ground almonds
  • 1 cup mashed potatoes
  • finely grated zest of 2 lemons
  • 2 tsp. baking powder
  • Optional: 1 cup fresh or frozen cranberries
  • Powdered sugar

Instructions
 

  • Preheat the oven to 350F. Butter a deep (3 inches would be best) 9-inch round cake pan, and line the bottom with a circle of parchment.
  • In a large bowl, beat the butter and sugar until light and fluffy, then beat in the eggs one at a time, beating after each addition. Fold in the almonds, cold mashed potato, lemon zest and baking powder. Gently stir in the berries.
  • Tip the batter into the pan and spread it evenly over the bottom. Smooth the top. Bake for 40-45 mins or until golden and springy to the touch.
  • Let the cake cool completely, then dust with powdered sugar before serving.