| 41. | Beat with a mixer at medium speed until well blended.
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| 42. | Beat 4 minutes on medium speed, scraping bowl occasionally.
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| 43. | Beat with electric mixer on medium speed 2 minutes.
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| 44. | Beat at medium speed until fluffy, about 2 minutes.
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| 45. | Beat on medium speed 4 minutes, scraping bowl occasionally.
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| 46. | Beat 4 minutes at medium speed of electric mixer.
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| 47. | Cream butter, sugar and lemon peel on medium speed.
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| 48. | Beat on medium speed until smooth, about 30 seconds.
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| 49. | With electric mixer, beat on medium speed until creamy.
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| 50. | With a mixer, beat on medium speed until creamy.
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