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1
Cream butter and sugar together.
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2
Add flour and baking powder and salt alternately with milk.
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3
Add vanilla and orange flavoring.
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4
Finally fold in the stiffly beaten egg whites.
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5
Divide equally between 3 9 inch layer cake pans greased and floured.
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6
Bale 375F (190C).
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7
about 20 to 25 minutes or until it tests done.
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8
Turn out to cool for at least 20 minutes before turning upright.
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9
When layers are cool assemble cake as follows Put bottom layer on a plate and spread lightly with orange marmalade.
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10
Put second layer upside down on bottom layer and spread it with marmalade, then put the third layer on the cake top side up.
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11
Spread generously with fluffy orange frosting.
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12
Orange frosting: Fill a large saucepan with about 3 inches of water.
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13
Heat until water begins to simmer.
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14
Turn heat off.
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15
Then in a 2 quart straight sided heat proof bowl combine the sugar, cream of tartar, salt, egg whites and cold water, reheat water in pan until it is again simmering, but not boiling.
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16
Set bowl in hot water and beat with rotary beater until frosting stands in peaks about 5 to 7 minutes.
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17
Remove from water add orange flavoring and vanilla and beat a few minutes longer to blend and to firm up the frosting.
