custard apple
US /ˈkʌs.tərd ˌæp.əl/
UK /ˈkʌs.tərd ˌæp.əl/

1.
a tropical fruit with a sweet, creamy, white or yellowish pulp and a green or yellowish-green skin, typically heart-shaped or conical
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The sweet, fragrant pulp of the custard apple is often eaten fresh.
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We made a delicious dessert with ripe custard apples.