What is the test for express malice in a murder case?

In reviewing these claims, we must consider the entire record in the light most favorable to the judgment to determine whether any rational trier of fact could have found, beyond a reasonable doubt, the disputed elements. (People v. Guerra (1985) 40 Cal.3d 377, 385, 220 Cal.Rptr. 374, 708 P.2d 1252; People v. Johnson (1980) 26 Cal.3d 557, 576-577, 162 Cal.Rptr. 431, 606 P.2d 738.)

Express malice requires simply an intent unlawfully to kill. (People v. Stress (1988) 205 Cal.App.3d 1259, 1268, 252 Cal.Rptr. 913; 188; see Discussion II, infra.) Express malice can be compatible with a killing that is the result of a bizarre and delusional motive. (Ibid.) In the present case, there is an abundance of evidence that defendant intended to kill her [221 Cal.App.3d 1434] children and such evidence is not limited to

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