Preheat the oven to 425 and grease a muffin tin with nonstick spray. Cream the butter, oil and sugars together, until light and fluffy. This usually takes me about 3 minutes. Add in the eggs and ...

Gently dip the top of each muffin in the melted butter, shaking lightly to remove excess, then press into sugar. Repeat with all muffins. Set on cooling rack. Gently press a small heart-shaped ...