Preheat the oven to 190°C (170°C fan) mark 5. Lightly grease two baking sheets with softened butter.
Step 2
In a large bowl, cream together the butter and sugar with an electric hand whisk until pale and fluffy. Beat in the egg until combined, then use a wooden spoon to stir in the oats, flour, baking powder, lemon zest, sultanas and maple syrup.
Step 3
Dust a work surface with a little flour, then take pieces of the mixture and roll into 12 even-sized balls. Put them on the greased baking sheets, spaced well apart. If making ahead, don't put the cookies on the baking sheets. Instead, put into a freeze-proof container lined with greaseproof paper. Seal and freeze for up to one month.
Step 4
Bake for 12-15min until golden. Leave to cool on the sheet for 5min, then transfer to a wire rack to cool completely. If serving from frozen, put the cookies on baking sheets and bake from frozen for 20-25min.
An experienced and highly skilled team of food writers, stylists and digital content producers, the Good Housekeeping Cookery Team is a close-knit squad of food obsessives. Cookery Editor Emma Franklin is our resident chilli obsessive and barbecue expert, who spends an inordinate amount of time on holidays poking round the local supermarkets seeking out new and exciting foods. Senior Cookery Writer Alice Shields is a former pastry chef and baking fanatic who loves making bread and would have peanut butter with everything if she could. Her favourite carb is pasta, and our vibrant green spaghetti is her weeknight go-to. Lover of all things savoury, Senior Cookery Writer Grace Evans can be found eating crispy corn and nocellara olives at every opportunity, and will take the cheeseboard over dessert any time (though she cannot resist a slice of tres leches cake). With a wealth of professional kitchen know-how, culinary training and years of experience between them, they are all dedicated to ensuring every Good Housekeeping recipe is the best it can be, so you can trust they’ll work (and if they don’t – we’ll have the answer for why*) every time (*90% of the time the answer is: “buy an separate oven thermometer”!).
