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Adjust oven rack to middle and preheat to 300F
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Pulse 1.5 cups almonds, flour, salt, baking powder, and baking soda in food processor until finely ground. Transfer to bowl
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Process eggs, 1.25 cups sugar, 1 Tbsp lemon zest, and almond extract until pale yellow and frothy (~30 seconds). Slowly add in oil until incorporated (~10 seconds). Add almond mixture and pulse to combine
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Transfer batter to greased 9 inch round cake pan lined with parchment paper
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Combine remaining 2 Tbsp sugar and 1/2 tsp lemon zest. Sprinkle top of cake with remaining 1/3 cup almonds, followed by sugar-zest mixture
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Bake until center of cake is set and inserted toothpick comes out clean, about 55-65 minutes. Rotate pan after 40 minutes
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Let cake cool in pan for 15 minutes on wire rack, then remove from pan and let cool completely on rack